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Finding the Fourth Proportional to 698,764.81, 964,329.64 and 392,937.47

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Solution

The fourth proportional to 698,764.81, 964,329.64 and 392,937.47 is: 542,272.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,764.81 : 964,329.64 = 392,937.47 : x
  2. Step 2: Convert to fraction form
    698,764.81/964,329.64 = 392,937.47/x
  3. Step 3: Cross multiply
    698,764.81x = 964,329.64 × 392,937.47
  4. Step 4: Simplify right side
    698,764.81x = 378,921,248,987.61
  5. Step 5: Solve for x
    x = 378,921,248,987.61/698,764.81
  6. Step 6: Final answer
    x = 542,272.94

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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.