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Finding the Fourth Proportional to 716,452, 988,703.72 and 394,155.20

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Solution

The fourth proportional to 716,452, 988,703.72 and 394,155.20 is: 543,934.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,452 : 988,703.72 = 394,155.20 : x
  2. Step 2: Convert to fraction form
    716,452/988,703.72 = 394,155.20/x
  3. Step 3: Cross multiply
    716,452x = 988,703.72 × 394,155.20
  4. Step 4: Simplify right side
    716,452x = 389,702,712,497.34
  5. Step 5: Solve for x
    x = 389,702,712,497.34/716,452
  6. Step 6: Final answer
    x = 543,934.15

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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.