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Finding the Fourth Proportional to 471,988.80, 706,816.80 and 313,358.40

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Solution

The fourth proportional to 471,988.80, 706,816.80 and 313,358.40 is: 469,263.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    471,988.80 : 706,816.80 = 313,358.40 : x
  2. Step 2: Convert to fraction form
    471,988.80/706,816.80 = 313,358.40/x
  3. Step 3: Cross multiply
    471,988.80x = 706,816.80 × 313,358.40
  4. Step 4: Simplify right side
    471,988.80x = 221,486,981,541.12
  5. Step 5: Solve for x
    x = 221,486,981,541.12/471,988.80
  6. Step 6: Final answer
    x = 469,263.21

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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.