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Finding the Fourth Proportional to 716,307.90, 988,538.14 and 394,012.14

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Solution

The fourth proportional to 716,307.90, 988,538.14 and 394,012.14 is: 543,755.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,307.90 : 988,538.14 = 394,012.14 : x
  2. Step 2: Convert to fraction form
    716,307.90/988,538.14 = 394,012.14/x
  3. Step 3: Cross multiply
    716,307.90x = 988,538.14 × 394,012.14
  4. Step 4: Simplify right side
    716,307.90x = 389,496,028,013.02
  5. Step 5: Solve for x
    x = 389,496,028,013.02/716,307.90
  6. Step 6: Final answer
    x = 543,755.04

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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.