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Finding the Fourth Proportional to 863,612.80, 1,295,419.20 and 302,574.40

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Solution

The fourth proportional to 863,612.80, 1,295,419.20 and 302,574.40 is: 453,861.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,612.80 : 1,295,419.20 = 302,574.40 : x
  2. Step 2: Convert to fraction form
    863,612.80/1,295,419.20 = 302,574.40/x
  3. Step 3: Cross multiply
    863,612.80x = 1,295,419.20 × 302,574.40
  4. Step 4: Simplify right side
    863,612.80x = 391,960,687,188.48
  5. Step 5: Solve for x
    x = 391,960,687,188.48/863,612.80
  6. Step 6: Final answer
    x = 453,861.60

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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.