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Finding the Fourth Proportional to 716,402.40, 988,613.92 and 394,112.32

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Solution

The fourth proportional to 716,402.40, 988,613.92 and 394,112.32 is: 543,863.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,402.40 : 988,613.92 = 394,112.32 : x
  2. Step 2: Convert to fraction form
    716,402.40/988,613.92 = 394,112.32/x
  3. Step 3: Cross multiply
    716,402.40x = 988,613.92 × 394,112.32
  4. Step 4: Simplify right side
    716,402.40x = 389,624,925,595.49
  5. Step 5: Solve for x
    x = 389,624,925,595.49/716,402.40
  6. Step 6: Final answer
    x = 543,863.23

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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.