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Finding the Fourth Proportional to 399,312.10, 598,968.15 and 133,081.30

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Solution

The fourth proportional to 399,312.10, 598,968.15 and 133,081.30 is: 199,621.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,312.10 : 598,968.15 = 133,081.30 : x
  2. Step 2: Convert to fraction form
    399,312.10/598,968.15 = 133,081.30/x
  3. Step 3: Cross multiply
    399,312.10x = 598,968.15 × 133,081.30
  4. Step 4: Simplify right side
    399,312.10x = 79,711,460,060.60
  5. Step 5: Solve for x
    x = 79,711,460,060.60/399,312.10
  6. Step 6: Final answer
    x = 199,621.95

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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.