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Finding the Fourth Proportional to 689,280.86, 951,066.80 and 402,745.57

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Solution

The fourth proportional to 689,280.86, 951,066.80 and 402,745.57 is: 555,706.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,280.86 : 951,066.80 = 402,745.57 : x
  2. Step 2: Convert to fraction form
    689,280.86/951,066.80 = 402,745.57/x
  3. Step 3: Cross multiply
    689,280.86x = 951,066.80 × 402,745.57
  4. Step 4: Simplify right side
    689,280.86x = 383,037,936,082.68
  5. Step 5: Solve for x
    x = 383,037,936,082.68/689,280.86
  6. Step 6: Final answer
    x = 555,706.62

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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.