Home / 499,470.08-689,270.12-318,143.20

Finding the Fourth Proportional to 499,470.08, 689,270.12 and 318,143.20

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Solution

The fourth proportional to 499,470.08, 689,270.12 and 318,143.20 is: 439,038.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,470.08 : 689,270.12 = 318,143.20 : x
  2. Step 2: Convert to fraction form
    499,470.08/689,270.12 = 318,143.20/x
  3. Step 3: Cross multiply
    499,470.08x = 689,270.12 × 318,143.20
  4. Step 4: Simplify right side
    499,470.08x = 219,286,601,641.18
  5. Step 5: Solve for x
    x = 219,286,601,641.18/499,470.08
  6. Step 6: Final answer
    x = 439,038.51

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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.