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Finding the Fourth Proportional to 520,872.70, 785,213.08 and 486,152.59

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Solution

The fourth proportional to 520,872.70, 785,213.08 and 486,152.59 is: 732,872.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,872.70 : 785,213.08 = 486,152.59 : x
  2. Step 2: Convert to fraction form
    520,872.70/785,213.08 = 486,152.59/x
  3. Step 3: Cross multiply
    520,872.70x = 785,213.08 × 486,152.59
  4. Step 4: Simplify right side
    520,872.70x = 381,733,372,543.88
  5. Step 5: Solve for x
    x = 381,733,372,543.88/520,872.70
  6. Step 6: Final answer
    x = 732,872.68

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.