Home / 749,040.80-1,121,228.40-432,557.60

Finding the Fourth Proportional to 749,040.80, 1,121,228.40 and 432,557.60

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Solution

The fourth proportional to 749,040.80, 1,121,228.40 and 432,557.60 is: 647,489.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    749,040.80 : 1,121,228.40 = 432,557.60 : x
  2. Step 2: Convert to fraction form
    749,040.80/1,121,228.40 = 432,557.60/x
  3. Step 3: Cross multiply
    749,040.80x = 1,121,228.40 × 432,557.60
  4. Step 4: Simplify right side
    749,040.80x = 484,995,865,755.84
  5. Step 5: Solve for x
    x = 484,995,865,755.84/749,040.80
  6. Step 6: Final answer
    x = 647,489.25

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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.