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Finding the Fourth Proportional to 538,922.40, 807,217.20 and 289,312.80

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Solution

The fourth proportional to 538,922.40, 807,217.20 and 289,312.80 is: 433,343.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,922.40 : 807,217.20 = 289,312.80 : x
  2. Step 2: Convert to fraction form
    538,922.40/807,217.20 = 289,312.80/x
  3. Step 3: Cross multiply
    538,922.40x = 807,217.20 × 289,312.80
  4. Step 4: Simplify right side
    538,922.40x = 233,538,268,340.16
  5. Step 5: Solve for x
    x = 233,538,268,340.16/538,922.40
  6. Step 6: Final answer
    x = 433,343.03

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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.