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Finding the Fourth Proportional to 524,081.40, 786,122.10 and 485,590.20

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Solution

The fourth proportional to 524,081.40, 786,122.10 and 485,590.20 is: 728,385.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    524,081.40 : 786,122.10 = 485,590.20 : x
  2. Step 2: Convert to fraction form
    524,081.40/786,122.10 = 485,590.20/x
  3. Step 3: Cross multiply
    524,081.40x = 786,122.10 × 485,590.20
  4. Step 4: Simplify right side
    524,081.40x = 381,733,187,763.42
  5. Step 5: Solve for x
    x = 381,733,187,763.42/524,081.40
  6. Step 6: Final answer
    x = 728,385.30

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Half scale
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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.