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Finding the Fourth Proportional to 420,336, 579,984.32 and 250,585.92

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Solution

The fourth proportional to 420,336, 579,984.32 and 250,585.92 is: 345,761.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,336 : 579,984.32 = 250,585.92 : x
  2. Step 2: Convert to fraction form
    420,336/579,984.32 = 250,585.92/x
  3. Step 3: Cross multiply
    420,336x = 579,984.32 × 250,585.92
  4. Step 4: Simplify right side
    420,336x = 145,335,904,412.77
  5. Step 5: Solve for x
    x = 145,335,904,412.77/420,336
  6. Step 6: Final answer
    x = 345,761.26

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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.