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Finding the Fourth Proportional to 385,430.70, 578,059.65 and 253,238.70

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Solution

The fourth proportional to 385,430.70, 578,059.65 and 253,238.70 is: 379,801.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,430.70 : 578,059.65 = 253,238.70 : x
  2. Step 2: Convert to fraction form
    385,430.70/578,059.65 = 253,238.70/x
  3. Step 3: Cross multiply
    385,430.70x = 578,059.65 × 253,238.70
  4. Step 4: Simplify right side
    385,430.70x = 146,387,074,288.46
  5. Step 5: Solve for x
    x = 146,387,074,288.46/385,430.70
  6. Step 6: Final answer
    x = 379,801.28

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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.