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Finding the Fourth Proportional to 288,970.13, 399,160.04 and 221,816.95

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Solution

The fourth proportional to 288,970.13, 399,160.04 and 221,816.95 is: 306,400.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,970.13 : 399,160.04 = 221,816.95 : x
  2. Step 2: Convert to fraction form
    288,970.13/399,160.04 = 221,816.95/x
  3. Step 3: Cross multiply
    288,970.13x = 399,160.04 × 221,816.95
  4. Step 4: Simplify right side
    288,970.13x = 88,540,460,527.69
  5. Step 5: Solve for x
    x = 88,540,460,527.69/288,970.13
  6. Step 6: Final answer
    x = 306,400.04

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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.