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Finding the Fourth Proportional to 523,009.40, 784,514.10 and 143,929.40

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Solution

The fourth proportional to 523,009.40, 784,514.10 and 143,929.40 is: 215,894.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    523,009.40 : 784,514.10 = 143,929.40 : x
  2. Step 2: Convert to fraction form
    523,009.40/784,514.10 = 143,929.40/x
  3. Step 3: Cross multiply
    523,009.40x = 784,514.10 × 143,929.40
  4. Step 4: Simplify right side
    523,009.40x = 112,914,643,704.54
  5. Step 5: Solve for x
    x = 112,914,643,704.54/523,009.40
  6. Step 6: Final answer
    x = 215,894.10

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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.