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Finding the Fourth Proportional to 665,115.96, 917,588.16 and 491,103.24

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Solution

The fourth proportional to 665,115.96, 917,588.16 and 491,103.24 is: 677,521.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,115.96 : 917,588.16 = 491,103.24 : x
  2. Step 2: Convert to fraction form
    665,115.96/917,588.16 = 491,103.24/x
  3. Step 3: Cross multiply
    665,115.96x = 917,588.16 × 491,103.24
  4. Step 4: Simplify right side
    665,115.96x = 450,630,518,361.64
  5. Step 5: Solve for x
    x = 450,630,518,361.64/665,115.96
  6. Step 6: Final answer
    x = 677,521.73

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.