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Finding the Fourth Proportional to 471,989.80, 706,818.30 and 313,359.40

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Solution

The fourth proportional to 471,989.80, 706,818.30 and 313,359.40 is: 469,264.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    471,989.80 : 706,818.30 = 313,359.40 : x
  2. Step 2: Convert to fraction form
    471,989.80/706,818.30 = 313,359.40/x
  3. Step 3: Cross multiply
    471,989.80x = 706,818.30 × 313,359.40
  4. Step 4: Simplify right side
    471,989.80x = 221,488,158,397.02
  5. Step 5: Solve for x
    x = 221,488,158,397.02/471,989.80
  6. Step 6: Final answer
    x = 469,264.71

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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.