Home / 502,739.12-693,795.48-287,948.72

Finding the Fourth Proportional to 502,739.12, 693,795.48 and 287,948.72

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Solution

The fourth proportional to 502,739.12, 693,795.48 and 287,948.72 is: 397,378.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,739.12 : 693,795.48 = 287,948.72 : x
  2. Step 2: Convert to fraction form
    502,739.12/693,795.48 = 287,948.72/x
  3. Step 3: Cross multiply
    502,739.12x = 693,795.48 × 287,948.72
  4. Step 4: Simplify right side
    502,739.12x = 199,777,520,407.79
  5. Step 5: Solve for x
    x = 199,777,520,407.79/502,739.12
  6. Step 6: Final answer
    x = 397,378.11

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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.