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Finding the Fourth Proportional to 625,048.25, 862,515.44 and 353,139.75

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Solution

The fourth proportional to 625,048.25, 862,515.44 and 353,139.75 is: 487,303.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,048.25 : 862,515.44 = 353,139.75 : x
  2. Step 2: Convert to fraction form
    625,048.25/862,515.44 = 353,139.75/x
  3. Step 3: Cross multiply
    625,048.25x = 862,515.44 × 353,139.75
  4. Step 4: Simplify right side
    625,048.25x = 304,588,486,411.32
  5. Step 5: Solve for x
    x = 304,588,486,411.32/625,048.25
  6. Step 6: Final answer
    x = 487,303.96

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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.