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Finding the Fourth Proportional to 716,445, 988,694.08 and 394,148.16

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Solution

The fourth proportional to 716,445, 988,694.08 and 394,148.16 is: 543,924.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,445 : 988,694.08 = 394,148.16 : x
  2. Step 2: Convert to fraction form
    716,445/988,694.08 = 394,148.16/x
  3. Step 3: Cross multiply
    716,445x = 988,694.08 × 394,148.16
  4. Step 4: Simplify right side
    716,445x = 389,691,952,434.89
  5. Step 5: Solve for x
    x = 389,691,952,434.89/716,445
  6. Step 6: Final answer
    x = 543,924.45

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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.