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Finding the Fourth Proportional to 387,369.68, 534,569.63 and 215,282.17

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Solution

The fourth proportional to 387,369.68, 534,569.63 and 215,282.17 is: 297,089.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,369.68 : 534,569.63 = 215,282.17 : x
  2. Step 2: Convert to fraction form
    387,369.68/534,569.63 = 215,282.17/x
  3. Step 3: Cross multiply
    387,369.68x = 534,569.63 × 215,282.17
  4. Step 4: Simplify right side
    387,369.68x = 115,083,309,554.30
  5. Step 5: Solve for x
    x = 115,083,309,554.30/387,369.68
  6. Step 6: Final answer
    x = 297,089.10

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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.