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Finding the Fourth Proportional to 485,084.40, 726,935.40 and 357,730.80

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Solution

The fourth proportional to 485,084.40, 726,935.40 and 357,730.80 is: 536,086.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,084.40 : 726,935.40 = 357,730.80 : x
  2. Step 2: Convert to fraction form
    485,084.40/726,935.40 = 357,730.80/x
  3. Step 3: Cross multiply
    485,084.40x = 726,935.40 × 357,730.80
  4. Step 4: Simplify right side
    485,084.40x = 260,047,182,190.32
  5. Step 5: Solve for x
    x = 260,047,182,190.32/485,084.40
  6. Step 6: Final answer
    x = 536,086.47

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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.