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Finding the Fourth Proportional to 387,316.71, 534,485.43 and 215,234.10

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Solution

The fourth proportional to 387,316.71, 534,485.43 and 215,234.10 is: 297,016.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,316.71 : 534,485.43 = 215,234.10 : x
  2. Step 2: Convert to fraction form
    387,316.71/534,485.43 = 215,234.10/x
  3. Step 3: Cross multiply
    387,316.71x = 534,485.43 × 215,234.10
  4. Step 4: Simplify right side
    387,316.71x = 115,039,490,489.16
  5. Step 5: Solve for x
    x = 115,039,490,489.16/387,316.71
  6. Step 6: Final answer
    x = 297,016.60

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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.