Home / 687,431.20-1,031,146.80-577,206.40

Finding the Fourth Proportional to 687,431.20, 1,031,146.80 and 577,206.40

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Solution

The fourth proportional to 687,431.20, 1,031,146.80 and 577,206.40 is: 865,809.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,431.20 : 1,031,146.80 = 577,206.40 : x
  2. Step 2: Convert to fraction form
    687,431.20/1,031,146.80 = 577,206.40/x
  3. Step 3: Cross multiply
    687,431.20x = 1,031,146.80 × 577,206.40
  4. Step 4: Simplify right side
    687,431.20x = 595,184,532,299.52
  5. Step 5: Solve for x
    x = 595,184,532,299.52/687,431.20
  6. Step 6: Final answer
    x = 865,809.60

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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.