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Finding the Fourth Proportional to 402,532.45, 555,485.45 and 218,766.70

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Solution

The fourth proportional to 402,532.45, 555,485.45 and 218,766.70 is: 301,892.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,532.45 : 555,485.45 = 218,766.70 : x
  2. Step 2: Convert to fraction form
    402,532.45/555,485.45 = 218,766.70/x
  3. Step 3: Cross multiply
    402,532.45x = 555,485.45 × 218,766.70
  4. Step 4: Simplify right side
    402,532.45x = 121,521,717,952.72
  5. Step 5: Solve for x
    x = 121,521,717,952.72/402,532.45
  6. Step 6: Final answer
    x = 301,892.97

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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.