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Finding the Fourth Proportional to 315,619.17, 435,547.72 and 172,379.78

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Solution

The fourth proportional to 315,619.17, 435,547.72 and 172,379.78 is: 237,880.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,619.17 : 435,547.72 = 172,379.78 : x
  2. Step 2: Convert to fraction form
    315,619.17/435,547.72 = 172,379.78/x
  3. Step 3: Cross multiply
    315,619.17x = 435,547.72 × 172,379.78
  4. Step 4: Simplify right side
    315,619.17x = 75,079,620,153.10
  5. Step 5: Solve for x
    x = 75,079,620,153.10/315,619.17
  6. Step 6: Final answer
    x = 237,880.42

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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.