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Finding the Fourth Proportional to 486,342.90, 729,341.55 and 220,230.90

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Solution

The fourth proportional to 486,342.90, 729,341.55 and 220,230.90 is: 330,268.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,342.90 : 729,341.55 = 220,230.90 : x
  2. Step 2: Convert to fraction form
    486,342.90/729,341.55 = 220,230.90/x
  3. Step 3: Cross multiply
    486,342.90x = 729,341.55 × 220,230.90
  4. Step 4: Simplify right side
    486,342.90x = 160,623,545,963.90
  5. Step 5: Solve for x
    x = 160,623,545,963.90/486,342.90
  6. Step 6: Final answer
    x = 330,268.10

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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.