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Finding the Fourth Proportional to 626,488.45, 864,554.65 and 340,008.61

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Solution

The fourth proportional to 626,488.45, 864,554.65 and 340,008.61 is: 469,212.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,488.45 : 864,554.65 = 340,008.61 : x
  2. Step 2: Convert to fraction form
    626,488.45/864,554.65 = 340,008.61/x
  3. Step 3: Cross multiply
    626,488.45x = 864,554.65 × 340,008.61
  4. Step 4: Simplify right side
    626,488.45x = 293,956,023,079.16
  5. Step 5: Solve for x
    x = 293,956,023,079.16/626,488.45
  6. Step 6: Final answer
    x = 469,212.20

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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.