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Finding the Fourth Proportional to 390,709.48, 539,262.84 and 237,796.92

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Solution

The fourth proportional to 390,709.48, 539,262.84 and 237,796.92 is: 328,210.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,709.48 : 539,262.84 = 237,796.92 : x
  2. Step 2: Convert to fraction form
    390,709.48/539,262.84 = 237,796.92/x
  3. Step 3: Cross multiply
    390,709.48x = 539,262.84 × 237,796.92
  4. Step 4: Simplify right side
    390,709.48x = 128,235,042,422.45
  5. Step 5: Solve for x
    x = 128,235,042,422.45/390,709.48
  6. Step 6: Final answer
    x = 328,210.73

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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.