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Finding the Fourth Proportional to 645,231.60, 969,247.08 and 621,612

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Solution

The fourth proportional to 645,231.60, 969,247.08 and 621,612 is: 933,766.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,231.60 : 969,247.08 = 621,612 : x
  2. Step 2: Convert to fraction form
    645,231.60/969,247.08 = 621,612/x
  3. Step 3: Cross multiply
    645,231.60x = 969,247.08 × 621,612
  4. Step 4: Simplify right side
    645,231.60x = 602,495,615,892.96
  5. Step 5: Solve for x
    x = 602,495,615,892.96/645,231.60
  6. Step 6: Final answer
    x = 933,766.44

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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.