Home / 859,121.40-1,288,682.10-438,342.60

Finding the Fourth Proportional to 859,121.40, 1,288,682.10 and 438,342.60

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Solution

The fourth proportional to 859,121.40, 1,288,682.10 and 438,342.60 is: 657,513.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,121.40 : 1,288,682.10 = 438,342.60 : x
  2. Step 2: Convert to fraction form
    859,121.40/1,288,682.10 = 438,342.60/x
  3. Step 3: Cross multiply
    859,121.40x = 1,288,682.10 × 438,342.60
  4. Step 4: Simplify right side
    859,121.40x = 564,884,262,287.46
  5. Step 5: Solve for x
    x = 564,884,262,287.46/859,121.40
  6. Step 6: Final answer
    x = 657,513.90

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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.