Home / 678,000.30-1,017,000.45-172,560.30

Finding the Fourth Proportional to 678,000.30, 1,017,000.45 and 172,560.30

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Solution

The fourth proportional to 678,000.30, 1,017,000.45 and 172,560.30 is: 258,840.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,000.30 : 1,017,000.45 = 172,560.30 : x
  2. Step 2: Convert to fraction form
    678,000.30/1,017,000.45 = 172,560.30/x
  3. Step 3: Cross multiply
    678,000.30x = 1,017,000.45 × 172,560.30
  4. Step 4: Simplify right side
    678,000.30x = 175,493,902,752.14
  5. Step 5: Solve for x
    x = 175,493,902,752.14/678,000.30
  6. Step 6: Final answer
    x = 258,840.45

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Double scale
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Similar ratio
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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.