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Finding the Fourth Proportional to 290,040.80, 435,061.20 and 286,104.20

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Solution

The fourth proportional to 290,040.80, 435,061.20 and 286,104.20 is: 429,156.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,040.80 : 435,061.20 = 286,104.20 : x
  2. Step 2: Convert to fraction form
    290,040.80/435,061.20 = 286,104.20/x
  3. Step 3: Cross multiply
    290,040.80x = 435,061.20 × 286,104.20
  4. Step 4: Simplify right side
    290,040.80x = 124,472,836,577.04
  5. Step 5: Solve for x
    x = 124,472,836,577.04/290,040.80
  6. Step 6: Final answer
    x = 429,156.30

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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.