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Finding the Fourth Proportional to 579,818.25, 870,317.06 and 399,916.17

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Solution

The fourth proportional to 579,818.25, 870,317.06 and 399,916.17 is: 600,280.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,818.25 : 870,317.06 = 399,916.17 : x
  2. Step 2: Convert to fraction form
    579,818.25/870,317.06 = 399,916.17/x
  3. Step 3: Cross multiply
    579,818.25x = 870,317.06 × 399,916.17
  4. Step 4: Simplify right side
    579,818.25x = 348,053,863,321.28
  5. Step 5: Solve for x
    x = 348,053,863,321.28/579,818.25
  6. Step 6: Final answer
    x = 600,280.97

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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.