Home / 985,689.80-1,478,534.70-424,724.30

Finding the Fourth Proportional to 985,689.80, 1,478,534.70 and 424,724.30

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Solution

The fourth proportional to 985,689.80, 1,478,534.70 and 424,724.30 is: 637,086.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,689.80 : 1,478,534.70 = 424,724.30 : x
  2. Step 2: Convert to fraction form
    985,689.80/1,478,534.70 = 424,724.30/x
  3. Step 3: Cross multiply
    985,689.80x = 1,478,534.70 × 424,724.30
  4. Step 4: Simplify right side
    985,689.80x = 627,969,615,483.21
  5. Step 5: Solve for x
    x = 627,969,615,483.21/985,689.80
  6. Step 6: Final answer
    x = 637,086.45

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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.