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Finding the Fourth Proportional to 660,538.76, 990,806.40 and 187,228.28

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Solution

The fourth proportional to 660,538.76, 990,806.40 and 187,228.28 is: 280,841.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,538.76 : 990,806.40 = 187,228.28 : x
  2. Step 2: Convert to fraction form
    660,538.76/990,806.40 = 187,228.28/x
  3. Step 3: Cross multiply
    660,538.76x = 990,806.40 × 187,228.28
  4. Step 4: Simplify right side
    660,538.76x = 185,506,978,084.99
  5. Step 5: Solve for x
    x = 185,506,978,084.99/660,538.76
  6. Step 6: Final answer
    x = 280,841.93

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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.