Home / 261,158.02-391,737.16-172,390.78

Finding the Fourth Proportional to 261,158.02, 391,737.16 and 172,390.78

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Solution

The fourth proportional to 261,158.02, 391,737.16 and 172,390.78 is: 258,586.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,158.02 : 391,737.16 = 172,390.78 : x
  2. Step 2: Convert to fraction form
    261,158.02/391,737.16 = 172,390.78/x
  3. Step 3: Cross multiply
    261,158.02x = 391,737.16 × 172,390.78
  4. Step 4: Simplify right side
    261,158.02x = 67,531,874,567.38
  5. Step 5: Solve for x
    x = 67,531,874,567.38/261,158.02
  6. Step 6: Final answer
    x = 258,586.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.