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Finding the Fourth Proportional to 372,017.80, 557,412.30 and 316,721.80

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Solution

The fourth proportional to 372,017.80, 557,412.30 and 316,721.80 is: 474,559.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,017.80 : 557,412.30 = 316,721.80 : x
  2. Step 2: Convert to fraction form
    372,017.80/557,412.30 = 316,721.80/x
  3. Step 3: Cross multiply
    372,017.80x = 557,412.30 × 316,721.80
  4. Step 4: Simplify right side
    372,017.80x = 176,544,626,998.14
  5. Step 5: Solve for x
    x = 176,544,626,998.14/372,017.80
  6. Step 6: Final answer
    x = 474,559.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.