Home / 642,122.85-886,144.28-351,762.15

Finding the Fourth Proportional to 642,122.85, 886,144.28 and 351,762.15

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Solution

The fourth proportional to 642,122.85, 886,144.28 and 351,762.15 is: 485,439.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,122.85 : 886,144.28 = 351,762.15 : x
  2. Step 2: Convert to fraction form
    642,122.85/886,144.28 = 351,762.15/x
  3. Step 3: Cross multiply
    642,122.85x = 886,144.28 × 351,762.15
  4. Step 4: Simplify right side
    642,122.85x = 311,712,015,384.19
  5. Step 5: Solve for x
    x = 311,712,015,384.19/642,122.85
  6. Step 6: Final answer
    x = 485,439.84

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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.