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Finding the Fourth Proportional to 666,154.80, 999,329.40 and 311,180.40

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Solution

The fourth proportional to 666,154.80, 999,329.40 and 311,180.40 is: 466,816.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,154.80 : 999,329.40 = 311,180.40 : x
  2. Step 2: Convert to fraction form
    666,154.80/999,329.40 = 311,180.40/x
  3. Step 3: Cross multiply
    666,154.80x = 999,329.40 × 311,180.40
  4. Step 4: Simplify right side
    666,154.80x = 310,971,722,423.76
  5. Step 5: Solve for x
    x = 310,971,722,423.76/666,154.80
  6. Step 6: Final answer
    x = 466,816.00

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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.