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Finding the Fourth Proportional to 272,215.60, 408,031.80 and 122,430.40

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Solution

The fourth proportional to 272,215.60, 408,031.80 and 122,430.40 is: 183,514.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,215.60 : 408,031.80 = 122,430.40 : x
  2. Step 2: Convert to fraction form
    272,215.60/408,031.80 = 122,430.40/x
  3. Step 3: Cross multiply
    272,215.60x = 408,031.80 × 122,430.40
  4. Step 4: Simplify right side
    272,215.60x = 49,955,496,486.72
  5. Step 5: Solve for x
    x = 49,955,496,486.72/272,215.60
  6. Step 6: Final answer
    x = 183,514.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.