Home / 810,000.30-1,215,000.45-248,961.90

Finding the Fourth Proportional to 810,000.30, 1,215,000.45 and 248,961.90

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Solution

The fourth proportional to 810,000.30, 1,215,000.45 and 248,961.90 is: 373,442.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,000.30 : 1,215,000.45 = 248,961.90 : x
  2. Step 2: Convert to fraction form
    810,000.30/1,215,000.45 = 248,961.90/x
  3. Step 3: Cross multiply
    810,000.30x = 1,215,000.45 × 248,961.90
  4. Step 4: Simplify right side
    810,000.30x = 302,488,820,532.86
  5. Step 5: Solve for x
    x = 302,488,820,532.86/810,000.30
  6. Step 6: Final answer
    x = 373,442.85

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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.