Home / 921,009.40-1,381,514.10-256,161.40

Finding the Fourth Proportional to 921,009.40, 1,381,514.10 and 256,161.40

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Solution

The fourth proportional to 921,009.40, 1,381,514.10 and 256,161.40 is: 384,242.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,009.40 : 1,381,514.10 = 256,161.40 : x
  2. Step 2: Convert to fraction form
    921,009.40/1,381,514.10 = 256,161.40/x
  3. Step 3: Cross multiply
    921,009.40x = 1,381,514.10 × 256,161.40
  4. Step 4: Simplify right side
    921,009.40x = 353,890,585,975.74
  5. Step 5: Solve for x
    x = 353,890,585,975.74/921,009.40
  6. Step 6: Final answer
    x = 384,242.10

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.