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Finding the Fourth Proportional to 315,087.80, 472,631.70 and 275,721.80

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Solution

The fourth proportional to 315,087.80, 472,631.70 and 275,721.80 is: 413,582.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,087.80 : 472,631.70 = 275,721.80 : x
  2. Step 2: Convert to fraction form
    315,087.80/472,631.70 = 275,721.80/x
  3. Step 3: Cross multiply
    315,087.80x = 472,631.70 × 275,721.80
  4. Step 4: Simplify right side
    315,087.80x = 130,314,863,061.06
  5. Step 5: Solve for x
    x = 130,314,863,061.06/315,087.80
  6. Step 6: Final answer
    x = 413,582.70

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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.