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Finding the Fourth Proportional to 390,596.40, 539,027.28 and 229,458.24

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Solution

The fourth proportional to 390,596.40, 539,027.28 and 229,458.24 is: 316,654.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,596.40 : 539,027.28 = 229,458.24 : x
  2. Step 2: Convert to fraction form
    390,596.40/539,027.28 = 229,458.24/x
  3. Step 3: Cross multiply
    390,596.40x = 539,027.28 × 229,458.24
  4. Step 4: Simplify right side
    390,596.40x = 123,684,250,980.79
  5. Step 5: Solve for x
    x = 123,684,250,980.79/390,596.40
  6. Step 6: Final answer
    x = 316,654.87

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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.