Home / 747,420.20-1,031,439.59-407,888.45

Finding the Fourth Proportional to 747,420.20, 1,031,439.59 and 407,888.45

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Solution

The fourth proportional to 747,420.20, 1,031,439.59 and 407,888.45 is: 562,885.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    747,420.20 : 1,031,439.59 = 407,888.45 : x
  2. Step 2: Convert to fraction form
    747,420.20/1,031,439.59 = 407,888.45/x
  3. Step 3: Cross multiply
    747,420.20x = 1,031,439.59 × 407,888.45
  4. Step 4: Simplify right side
    747,420.20x = 420,712,288,437.10
  5. Step 5: Solve for x
    x = 420,712,288,437.10/747,420.20
  6. Step 6: Final answer
    x = 562,885.90

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.