Home / 387,318.71-534,488.19-215,236.10

Finding the Fourth Proportional to 387,318.71, 534,488.19 and 215,236.10

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Solution

The fourth proportional to 387,318.71, 534,488.19 and 215,236.10 is: 297,019.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,318.71 : 534,488.19 = 215,236.10 : x
  2. Step 2: Convert to fraction form
    387,318.71/534,488.19 = 215,236.10/x
  3. Step 3: Cross multiply
    387,318.71x = 534,488.19 × 215,236.10
  4. Step 4: Simplify right side
    387,318.71x = 115,041,153,511.66
  5. Step 5: Solve for x
    x = 115,041,153,511.66/387,318.71
  6. Step 6: Final answer
    x = 297,019.36

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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.