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Finding the Fourth Proportional to 402,346.80, 555,229.65 and 218,580.61

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Solution

The fourth proportional to 402,346.80, 555,229.65 and 218,580.61 is: 301,636.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,346.80 : 555,229.65 = 218,580.61 : x
  2. Step 2: Convert to fraction form
    402,346.80/555,229.65 = 218,580.61/x
  3. Step 3: Cross multiply
    402,346.80x = 555,229.65 × 218,580.61
  4. Step 4: Simplify right side
    402,346.80x = 121,362,435,587.09
  5. Step 5: Solve for x
    x = 121,362,435,587.09/402,346.80
  6. Step 6: Final answer
    x = 301,636.39

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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.