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Finding the Fourth Proportional to 315,773.31, 435,762.09 and 172,530.28

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Solution

The fourth proportional to 315,773.31, 435,762.09 and 172,530.28 is: 238,089.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,773.31 : 435,762.09 = 172,530.28 : x
  2. Step 2: Convert to fraction form
    315,773.31/435,762.09 = 172,530.28/x
  3. Step 3: Cross multiply
    315,773.31x = 435,762.09 × 172,530.28
  4. Step 4: Simplify right side
    315,773.31x = 75,182,155,401.09
  5. Step 5: Solve for x
    x = 75,182,155,401.09/315,773.31
  6. Step 6: Final answer
    x = 238,089.01

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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.