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Finding the Fourth Proportional to 626,961.18, 865,471.19 and 423,287.90

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Solution

The fourth proportional to 626,961.18, 865,471.19 and 423,287.90 is: 584,316.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,961.18 : 865,471.19 = 423,287.90 : x
  2. Step 2: Convert to fraction form
    626,961.18/865,471.19 = 423,287.90/x
  3. Step 3: Cross multiply
    626,961.18x = 865,471.19 × 423,287.90
  4. Step 4: Simplify right side
    626,961.18x = 366,343,476,081.81
  5. Step 5: Solve for x
    x = 366,343,476,081.81/626,961.18
  6. Step 6: Final answer
    x = 584,316.04

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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.