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Finding the Fourth Proportional to 666,938.80, 999,727.80 and 329,460.40

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Solution

The fourth proportional to 666,938.80, 999,727.80 and 329,460.40 is: 493,854.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,938.80 : 999,727.80 = 329,460.40 : x
  2. Step 2: Convert to fraction form
    666,938.80/999,727.80 = 329,460.40/x
  3. Step 3: Cross multiply
    666,938.80x = 999,727.80 × 329,460.40
  4. Step 4: Simplify right side
    666,938.80x = 329,370,720,879.12
  5. Step 5: Solve for x
    x = 329,370,720,879.12/666,938.80
  6. Step 6: Final answer
    x = 493,854.49

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1.5x scale

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.