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Finding the Fourth Proportional to 385,755.20, 578,632.80 and 101,445.20

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Solution

The fourth proportional to 385,755.20, 578,632.80 and 101,445.20 is: 152,167.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,755.20 : 578,632.80 = 101,445.20 : x
  2. Step 2: Convert to fraction form
    385,755.20/578,632.80 = 101,445.20/x
  3. Step 3: Cross multiply
    385,755.20x = 578,632.80 × 101,445.20
  4. Step 4: Simplify right side
    385,755.20x = 58,699,520,122.56
  5. Step 5: Solve for x
    x = 58,699,520,122.56/385,755.20
  6. Step 6: Final answer
    x = 152,167.80

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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.