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Finding the Fourth Proportional to 625,455.90, 863,106 and 338,969.88

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Solution

The fourth proportional to 625,455.90, 863,106 and 338,969.88 is: 467,765.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,455.90 : 863,106 = 338,969.88 : x
  2. Step 2: Convert to fraction form
    625,455.90/863,106 = 338,969.88/x
  3. Step 3: Cross multiply
    625,455.90x = 863,106 × 338,969.88
  4. Step 4: Simplify right side
    625,455.90x = 292,566,937,247.28
  5. Step 5: Solve for x
    x = 292,566,937,247.28/625,455.90
  6. Step 6: Final answer
    x = 467,765.89

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1.5x scale

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.