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Finding the Fourth Proportional to 369,990.60, 554,742.90 and 145,215.60

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Solution

The fourth proportional to 369,990.60, 554,742.90 and 145,215.60 is: 217,728.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    369,990.60 : 554,742.90 = 145,215.60 : x
  2. Step 2: Convert to fraction form
    369,990.60/554,742.90 = 145,215.60/x
  3. Step 3: Cross multiply
    369,990.60x = 554,742.90 × 145,215.60
  4. Step 4: Simplify right side
    369,990.60x = 80,557,323,069.24
  5. Step 5: Solve for x
    x = 80,557,323,069.24/369,990.60
  6. Step 6: Final answer
    x = 217,728.03

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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.