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Finding the Fourth Proportional to 315,880.70, 435,908.89 and 172,641.77

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Solution

The fourth proportional to 315,880.70, 435,908.89 and 172,641.77 is: 238,242.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,880.70 : 435,908.89 = 172,641.77 : x
  2. Step 2: Convert to fraction form
    315,880.70/435,908.89 = 172,641.77/x
  3. Step 3: Cross multiply
    315,880.70x = 435,908.89 × 172,641.77
  4. Step 4: Simplify right side
    315,880.70x = 75,256,079,717.19
  5. Step 5: Solve for x
    x = 75,256,079,717.19/315,880.70
  6. Step 6: Final answer
    x = 238,242.10

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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.