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Finding the Fourth Proportional to 402,630.34, 555,640.62 and 218,881.30

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Solution

The fourth proportional to 402,630.34, 555,640.62 and 218,881.30 is: 302,062.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,630.34 : 555,640.62 = 218,881.30 : x
  2. Step 2: Convert to fraction form
    402,630.34/555,640.62 = 218,881.30/x
  3. Step 3: Cross multiply
    402,630.34x = 555,640.62 × 218,881.30
  4. Step 4: Simplify right side
    402,630.34x = 121,619,341,238.41
  5. Step 5: Solve for x
    x = 121,619,341,238.41/402,630.34
  6. Step 6: Final answer
    x = 302,062.04

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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.