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Finding the Fourth Proportional to 660,316.88, 990,956.28 and 239,626.64

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Solution

The fourth proportional to 660,316.88, 990,956.28 and 239,626.64 is: 359,614.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,316.88 : 990,956.28 = 239,626.64 : x
  2. Step 2: Convert to fraction form
    660,316.88/990,956.28 = 239,626.64/x
  3. Step 3: Cross multiply
    660,316.88x = 990,956.28 × 239,626.64
  4. Step 4: Simplify right side
    660,316.88x = 237,459,523,763.30
  5. Step 5: Solve for x
    x = 237,459,523,763.30/660,316.88
  6. Step 6: Final answer
    x = 359,614.50

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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.