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Finding the Fourth Proportional to 385,332.80, 577,999.20 and 315,291.20

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Solution

The fourth proportional to 385,332.80, 577,999.20 and 315,291.20 is: 472,936.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,332.80 : 577,999.20 = 315,291.20 : x
  2. Step 2: Convert to fraction form
    385,332.80/577,999.20 = 315,291.20/x
  3. Step 3: Cross multiply
    385,332.80x = 577,999.20 × 315,291.20
  4. Step 4: Simplify right side
    385,332.80x = 182,238,061,367.04
  5. Step 5: Solve for x
    x = 182,238,061,367.04/385,332.80
  6. Step 6: Final answer
    x = 472,936.80

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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.