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Finding the Fourth Proportional to 486,490.20, 727,985.70 and 329,026.20

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Solution

The fourth proportional to 486,490.20, 727,985.70 and 329,026.20 is: 492,356.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,490.20 : 727,985.70 = 329,026.20 : x
  2. Step 2: Convert to fraction form
    486,490.20/727,985.70 = 329,026.20/x
  3. Step 3: Cross multiply
    486,490.20x = 727,985.70 × 329,026.20
  4. Step 4: Simplify right side
    486,490.20x = 239,526,368,525.34
  5. Step 5: Solve for x
    x = 239,526,368,525.34/486,490.20
  6. Step 6: Final answer
    x = 492,356.00

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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.