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Finding the Fourth Proportional to 387,287.13, 580,914.90 and 134,624.91

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Solution

The fourth proportional to 387,287.13, 580,914.90 and 134,624.91 is: 201,931.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,287.13 : 580,914.90 = 134,624.91 : x
  2. Step 2: Convert to fraction form
    387,287.13/580,914.90 = 134,624.91/x
  3. Step 3: Cross multiply
    387,287.13x = 580,914.90 × 134,624.91
  4. Step 4: Simplify right side
    387,287.13x = 78,205,616,130.16
  5. Step 5: Solve for x
    x = 78,205,616,130.16/387,287.13
  6. Step 6: Final answer
    x = 201,931.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.