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Finding the Fourth Proportional to 387,658.78, 534,890.70 and 226,482.68

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Solution

The fourth proportional to 387,658.78, 534,890.70 and 226,482.68 is: 312,500.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,658.78 : 534,890.70 = 226,482.68 : x
  2. Step 2: Convert to fraction form
    387,658.78/534,890.70 = 226,482.68/x
  3. Step 3: Cross multiply
    387,658.78x = 534,890.70 × 226,482.68
  4. Step 4: Simplify right side
    387,658.78x = 121,143,478,110.66
  5. Step 5: Solve for x
    x = 121,143,478,110.66/387,658.78
  6. Step 6: Final answer
    x = 312,500.29

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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.