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Finding the Fourth Proportional to 417,745.80, 626,618.70 and 389,752.20

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Solution

The fourth proportional to 417,745.80, 626,618.70 and 389,752.20 is: 584,628.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,745.80 : 626,618.70 = 389,752.20 : x
  2. Step 2: Convert to fraction form
    417,745.80/626,618.70 = 389,752.20/x
  3. Step 3: Cross multiply
    417,745.80x = 626,618.70 × 389,752.20
  4. Step 4: Simplify right side
    417,745.80x = 244,226,016,886.14
  5. Step 5: Solve for x
    x = 244,226,016,886.14/417,745.80
  6. Step 6: Final answer
    x = 584,628.30

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.