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Finding the Fourth Proportional to 626,939.86, 865,441.84 and 423,266.65

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Solution

The fourth proportional to 626,939.86, 865,441.84 and 423,266.65 is: 584,286.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,939.86 : 865,441.84 = 423,266.65 : x
  2. Step 2: Convert to fraction form
    626,939.86/865,441.84 = 423,266.65/x
  3. Step 3: Cross multiply
    626,939.86x = 865,441.84 × 423,266.65
  4. Step 4: Simplify right side
    626,939.86x = 366,312,668,386.64
  5. Step 5: Solve for x
    x = 366,312,668,386.64/626,939.86
  6. Step 6: Final answer
    x = 584,286.77

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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.