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Finding the Fourth Proportional to 387,643.53, 581,493.02 and 103,332.63

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Solution

The fourth proportional to 387,643.53, 581,493.02 and 103,332.63 is: 155,006.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,643.53 : 581,493.02 = 103,332.63 : x
  2. Step 2: Convert to fraction form
    387,643.53/581,493.02 = 103,332.63/x
  3. Step 3: Cross multiply
    387,643.53x = 581,493.02 × 103,332.63
  4. Step 4: Simplify right side
    387,643.53x = 60,087,202,566.58
  5. Step 5: Solve for x
    x = 60,087,202,566.58/387,643.53
  6. Step 6: Final answer
    x = 155,006.33

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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.