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Finding the Fourth Proportional to 665,090.07, 917,552.58 and 491,077.31

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Solution

The fourth proportional to 665,090.07, 917,552.58 and 491,077.31 is: 677,486.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,090.07 : 917,552.58 = 491,077.31 : x
  2. Step 2: Convert to fraction form
    665,090.07/917,552.58 = 491,077.31/x
  3. Step 3: Cross multiply
    665,090.07x = 917,552.58 × 491,077.31
  4. Step 4: Simplify right side
    665,090.07x = 450,589,246,340.66
  5. Step 5: Solve for x
    x = 450,589,246,340.66/665,090.07
  6. Step 6: Final answer
    x = 677,486.06

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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.