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Finding the Fourth Proportional to 315,853.48, 435,877.97 and 172,613.50

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Solution

The fourth proportional to 315,853.48, 435,877.97 and 172,613.50 is: 238,206.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,853.48 : 435,877.97 = 172,613.50 : x
  2. Step 2: Convert to fraction form
    315,853.48/435,877.97 = 172,613.50/x
  3. Step 3: Cross multiply
    315,853.48x = 435,877.97 × 172,613.50
  4. Step 4: Simplify right side
    315,853.48x = 75,238,421,974.60
  5. Step 5: Solve for x
    x = 75,238,421,974.60/315,853.48
  6. Step 6: Final answer
    x = 238,206.72

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1.5x scale

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.