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Finding the Fourth Proportional to 716,752.40, 989,118.48 and 394,462.40

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Solution

The fourth proportional to 716,752.40, 989,118.48 and 394,462.40 is: 544,358.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,752.40 : 989,118.48 = 394,462.40 : x
  2. Step 2: Convert to fraction form
    716,752.40/989,118.48 = 394,462.40/x
  3. Step 3: Cross multiply
    716,752.40x = 989,118.48 × 394,462.40
  4. Step 4: Simplify right side
    716,752.40x = 390,170,049,505.15
  5. Step 5: Solve for x
    x = 390,170,049,505.15/716,752.40
  6. Step 6: Final answer
    x = 544,358.20

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.