Home / 678,391.20-1,017,586.80-479,325.60

Finding the Fourth Proportional to 678,391.20, 1,017,586.80 and 479,325.60

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Solution

The fourth proportional to 678,391.20, 1,017,586.80 and 479,325.60 is: 718,988.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,391.20 : 1,017,586.80 = 479,325.60 : x
  2. Step 2: Convert to fraction form
    678,391.20/1,017,586.80 = 479,325.60/x
  3. Step 3: Cross multiply
    678,391.20x = 1,017,586.80 × 479,325.60
  4. Step 4: Simplify right side
    678,391.20x = 487,755,403,462.08
  5. Step 5: Solve for x
    x = 487,755,403,462.08/678,391.20
  6. Step 6: Final answer
    x = 718,988.40

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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.