Home / 642,557.80-886,734.90-356,082.64

Finding the Fourth Proportional to 642,557.80, 886,734.90 and 356,082.64

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Solution

The fourth proportional to 642,557.80, 886,734.90 and 356,082.64 is: 491,396.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,557.80 : 886,734.90 = 356,082.64 : x
  2. Step 2: Convert to fraction form
    642,557.80/886,734.90 = 356,082.64/x
  3. Step 3: Cross multiply
    642,557.80x = 886,734.90 × 356,082.64
  4. Step 4: Simplify right side
    642,557.80x = 315,750,904,172.14
  5. Step 5: Solve for x
    x = 315,750,904,172.14/642,557.80
  6. Step 6: Final answer
    x = 491,396.89

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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.