Home / 457,865.10-687,002.45-208,418.70

Finding the Fourth Proportional to 457,865.10, 687,002.45 and 208,418.70

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Solution

The fourth proportional to 457,865.10, 687,002.45 and 208,418.70 is: 312,721.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,865.10 : 687,002.45 = 208,418.70 : x
  2. Step 2: Convert to fraction form
    457,865.10/687,002.45 = 208,418.70/x
  3. Step 3: Cross multiply
    457,865.10x = 687,002.45 × 208,418.70
  4. Step 4: Simplify right side
    457,865.10x = 143,184,157,525.82
  5. Step 5: Solve for x
    x = 143,184,157,525.82/457,865.10
  6. Step 6: Final answer
    x = 312,721.27

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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.