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Finding the Fourth Proportional to 716,277.40, 988,442.16 and 393,987.48

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Solution

The fourth proportional to 716,277.40, 988,442.16 and 393,987.48 is: 543,691.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,277.40 : 988,442.16 = 393,987.48 : x
  2. Step 2: Convert to fraction form
    716,277.40/988,442.16 = 393,987.48/x
  3. Step 3: Cross multiply
    716,277.40x = 988,442.16 × 393,987.48
  4. Step 4: Simplify right side
    716,277.40x = 389,433,835,744.16
  5. Step 5: Solve for x
    x = 389,433,835,744.16/716,277.40
  6. Step 6: Final answer
    x = 543,691.36

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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.