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Finding the Fourth Proportional to 387,617.64, 534,899.88 and 215,534.76

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Solution

The fourth proportional to 387,617.64, 534,899.88 and 215,534.76 is: 297,431.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,617.64 : 534,899.88 = 215,534.76 : x
  2. Step 2: Convert to fraction form
    387,617.64/534,899.88 = 215,534.76/x
  3. Step 3: Cross multiply
    387,617.64x = 534,899.88 × 215,534.76
  4. Step 4: Simplify right side
    387,617.64x = 115,289,517,259.83
  5. Step 5: Solve for x
    x = 115,289,517,259.83/387,617.64
  6. Step 6: Final answer
    x = 297,431.04

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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.