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Finding the Fourth Proportional to 315,551.30, 435,444.54 and 172,283.72

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Solution

The fourth proportional to 315,551.30, 435,444.54 and 172,283.72 is: 237,742.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,551.30 : 435,444.54 = 172,283.72 : x
  2. Step 2: Convert to fraction form
    315,551.30/435,444.54 = 172,283.72/x
  3. Step 3: Cross multiply
    315,551.30x = 435,444.54 × 172,283.72
  4. Step 4: Simplify right side
    315,551.30x = 75,020,005,204.89
  5. Step 5: Solve for x
    x = 75,020,005,204.89/315,551.30
  6. Step 6: Final answer
    x = 237,742.66

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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.