Home / 485,815.20-670,425.88-270,969.12

Finding the Fourth Proportional to 485,815.20, 670,425.88 and 270,969.12

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Solution

The fourth proportional to 485,815.20, 670,425.88 and 270,969.12 is: 373,937.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,815.20 : 670,425.88 = 270,969.12 : x
  2. Step 2: Convert to fraction form
    485,815.20/670,425.88 = 270,969.12/x
  3. Step 3: Cross multiply
    485,815.20x = 670,425.88 × 270,969.12
  4. Step 4: Simplify right side
    485,815.20x = 181,664,710,728.83
  5. Step 5: Solve for x
    x = 181,664,710,728.83/485,815.20
  6. Step 6: Final answer
    x = 373,937.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.