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Finding the Fourth Proportional to 528,614.61, 729,490.86 and 310,810.97

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Solution

The fourth proportional to 528,614.61, 729,490.86 and 310,810.97 is: 428,920.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,614.61 : 729,490.86 = 310,810.97 : x
  2. Step 2: Convert to fraction form
    528,614.61/729,490.86 = 310,810.97/x
  3. Step 3: Cross multiply
    528,614.61x = 729,490.86 × 310,810.97
  4. Step 4: Simplify right side
    528,614.61x = 226,733,763,626.46
  5. Step 5: Solve for x
    x = 226,733,763,626.46/528,614.61
  6. Step 6: Final answer
    x = 428,920.73

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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.