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Finding the Fourth Proportional to 457,987.18, 687,010.17 and 121,019.22

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Solution

The fourth proportional to 457,987.18, 687,010.17 and 121,019.22 is: 181,536.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,987.18 : 687,010.17 = 121,019.22 : x
  2. Step 2: Convert to fraction form
    457,987.18/687,010.17 = 121,019.22/x
  3. Step 3: Cross multiply
    457,987.18x = 687,010.17 × 121,019.22
  4. Step 4: Simplify right side
    457,987.18x = 83,141,430,865.32
  5. Step 5: Solve for x
    x = 83,141,430,865.32/457,987.18
  6. Step 6: Final answer
    x = 181,536.59

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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.