Home / 748,853.80-1,123,280.70-660,280.30

Finding the Fourth Proportional to 748,853.80, 1,123,280.70 and 660,280.30

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Solution

The fourth proportional to 748,853.80, 1,123,280.70 and 660,280.30 is: 990,420.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    748,853.80 : 1,123,280.70 = 660,280.30 : x
  2. Step 2: Convert to fraction form
    748,853.80/1,123,280.70 = 660,280.30/x
  3. Step 3: Cross multiply
    748,853.80x = 1,123,280.70 × 660,280.30
  4. Step 4: Simplify right side
    748,853.80x = 741,680,117,580.21
  5. Step 5: Solve for x
    x = 741,680,117,580.21/748,853.80
  6. Step 6: Final answer
    x = 990,420.45

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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.