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Finding the Fourth Proportional to 287,355.80, 431,033.70 and 109,868.60

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Solution

The fourth proportional to 287,355.80, 431,033.70 and 109,868.60 is: 164,802.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,355.80 : 431,033.70 = 109,868.60 : x
  2. Step 2: Convert to fraction form
    287,355.80/431,033.70 = 109,868.60/x
  3. Step 3: Cross multiply
    287,355.80x = 431,033.70 × 109,868.60
  4. Step 4: Simplify right side
    287,355.80x = 47,357,069,171.82
  5. Step 5: Solve for x
    x = 47,357,069,171.82/287,355.80
  6. Step 6: Final answer
    x = 164,802.90

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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.