Home / 485,420.38-669,868.71-281,507.74

Finding the Fourth Proportional to 485,420.38, 669,868.71 and 281,507.74

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Solution

The fourth proportional to 485,420.38, 669,868.71 and 281,507.74 is: 388,474.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,420.38 : 669,868.71 = 281,507.74 : x
  2. Step 2: Convert to fraction form
    485,420.38/669,868.71 = 281,507.74/x
  3. Step 3: Cross multiply
    485,420.38x = 669,868.71 × 281,507.74
  4. Step 4: Simplify right side
    485,420.38x = 188,573,226,648.82
  5. Step 5: Solve for x
    x = 188,573,226,648.82/485,420.38
  6. Step 6: Final answer
    x = 388,474.06

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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.