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Finding the Fourth Proportional to 387,153.39, 534,178.21 and 225,916.41

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Solution

The fourth proportional to 387,153.39, 534,178.21 and 225,916.41 is: 311,710.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,153.39 : 534,178.21 = 225,916.41 : x
  2. Step 2: Convert to fraction form
    387,153.39/534,178.21 = 225,916.41/x
  3. Step 3: Cross multiply
    387,153.39x = 534,178.21 × 225,916.41
  4. Step 4: Simplify right side
    387,153.39x = 120,679,625,365.40
  5. Step 5: Solve for x
    x = 120,679,625,365.40/387,153.39
  6. Step 6: Final answer
    x = 311,710.11

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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.