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Finding the Fourth Proportional to 708,385.76, 977,572.71 and 402,462.67

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Solution

The fourth proportional to 708,385.76, 977,572.71 and 402,462.67 is: 555,398.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,385.76 : 977,572.71 = 402,462.67 : x
  2. Step 2: Convert to fraction form
    708,385.76/977,572.71 = 402,462.67/x
  3. Step 3: Cross multiply
    708,385.76x = 977,572.71 × 402,462.67
  4. Step 4: Simplify right side
    708,385.76x = 393,436,522,985.74
  5. Step 5: Solve for x
    x = 393,436,522,985.74/708,385.76
  6. Step 6: Final answer
    x = 555,398.69

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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.