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Finding the Fourth Proportional to 385,337.20, 578,005.80 and 245,714.80

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Solution

The fourth proportional to 385,337.20, 578,005.80 and 245,714.80 is: 368,572.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,337.20 : 578,005.80 = 245,714.80 : x
  2. Step 2: Convert to fraction form
    385,337.20/578,005.80 = 245,714.80/x
  3. Step 3: Cross multiply
    385,337.20x = 578,005.80 × 245,714.80
  4. Step 4: Simplify right side
    385,337.20x = 142,024,579,545.84
  5. Step 5: Solve for x
    x = 142,024,579,545.84/385,337.20
  6. Step 6: Final answer
    x = 368,572.20

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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.