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Finding the Fourth Proportional to 315,776.16, 435,801.36 and 172,557.92

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Solution

The fourth proportional to 315,776.16, 435,801.36 and 172,557.92 is: 238,146.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,776.16 : 435,801.36 = 172,557.92 : x
  2. Step 2: Convert to fraction form
    315,776.16/435,801.36 = 172,557.92/x
  3. Step 3: Cross multiply
    315,776.16x = 435,801.36 × 172,557.92
  4. Step 4: Simplify right side
    315,776.16x = 75,200,976,214.77
  5. Step 5: Solve for x
    x = 75,200,976,214.77/315,776.16
  6. Step 6: Final answer
    x = 238,146.46

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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.