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Finding the Fourth Proportional to 522,707.18, 721,379.39 and 290,156.00

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Solution

The fourth proportional to 522,707.18, 721,379.39 and 290,156.00 is: 400,439.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,707.18 : 721,379.39 = 290,156.00 : x
  2. Step 2: Convert to fraction form
    522,707.18/721,379.39 = 290,156.00/x
  3. Step 3: Cross multiply
    522,707.18x = 721,379.39 × 290,156.00
  4. Step 4: Simplify right side
    522,707.18x = 209,312,553,227.16
  5. Step 5: Solve for x
    x = 209,312,553,227.16/522,707.18
  6. Step 6: Final answer
    x = 400,439.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.