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Finding the Fourth Proportional to 611,330.46, 915,802.71 and 400,328.70

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Solution

The fourth proportional to 611,330.46, 915,802.71 and 400,328.70 is: 599,711.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,330.46 : 915,802.71 = 400,328.70 : x
  2. Step 2: Convert to fraction form
    611,330.46/915,802.71 = 400,328.70/x
  3. Step 3: Cross multiply
    611,330.46x = 915,802.71 × 400,328.70
  4. Step 4: Simplify right side
    611,330.46x = 366,622,108,350.78
  5. Step 5: Solve for x
    x = 366,622,108,350.78/611,330.46
  6. Step 6: Final answer
    x = 599,711.83

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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.