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Finding the Fourth Proportional to 887,213.80, 1,330,604.70 and 256,061.80

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Solution

The fourth proportional to 887,213.80, 1,330,604.70 and 256,061.80 is: 384,030.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,213.80 : 1,330,604.70 = 256,061.80 : x
  2. Step 2: Convert to fraction form
    887,213.80/1,330,604.70 = 256,061.80/x
  3. Step 3: Cross multiply
    887,213.80x = 1,330,604.70 × 256,061.80
  4. Step 4: Simplify right side
    887,213.80x = 340,717,034,570.46
  5. Step 5: Solve for x
    x = 340,717,034,570.46/887,213.80
  6. Step 6: Final answer
    x = 384,030.36

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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.