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Finding the Fourth Proportional to 387,387.83, 534,658.65 and 322,754.57

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Solution

The fourth proportional to 387,387.83, 534,658.65 and 322,754.57 is: 445,454.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,387.83 : 534,658.65 = 322,754.57 : x
  2. Step 2: Convert to fraction form
    387,387.83/534,658.65 = 322,754.57/x
  3. Step 3: Cross multiply
    387,387.83x = 534,658.65 × 322,754.57
  4. Step 4: Simplify right side
    387,387.83x = 172,563,520,004.24
  5. Step 5: Solve for x
    x = 172,563,520,004.24/387,387.83
  6. Step 6: Final answer
    x = 445,454.16

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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.