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Finding the Fourth Proportional to 646,686.10, 970,029.15 and 225,907.30

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Solution

The fourth proportional to 646,686.10, 970,029.15 and 225,907.30 is: 338,860.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,686.10 : 970,029.15 = 225,907.30 : x
  2. Step 2: Convert to fraction form
    646,686.10/970,029.15 = 225,907.30/x
  3. Step 3: Cross multiply
    646,686.10x = 970,029.15 × 225,907.30
  4. Step 4: Simplify right side
    646,686.10x = 219,136,666,197.80
  5. Step 5: Solve for x
    x = 219,136,666,197.80/646,686.10
  6. Step 6: Final answer
    x = 338,860.95

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Double scale
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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.