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Finding the Fourth Proportional to 487,128, 672,209.39 and 269,323.99

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Solution

The fourth proportional to 487,128, 672,209.39 and 269,323.99 is: 371,652.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,128 : 672,209.39 = 269,323.99 : x
  2. Step 2: Convert to fraction form
    487,128/672,209.39 = 269,323.99/x
  3. Step 3: Cross multiply
    487,128x = 672,209.39 × 269,323.99
  4. Step 4: Simplify right side
    487,128x = 181,042,115,030.27
  5. Step 5: Solve for x
    x = 181,042,115,030.27/487,128
  6. Step 6: Final answer
    x = 371,652.04

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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.