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Finding the Fourth Proportional to 628,747.80, 867,672.03 and 342,270

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Solution

The fourth proportional to 628,747.80, 867,672.03 and 342,270 is: 472,332.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,747.80 : 867,672.03 = 342,270 : x
  2. Step 2: Convert to fraction form
    628,747.80/867,672.03 = 342,270/x
  3. Step 3: Cross multiply
    628,747.80x = 867,672.03 × 342,270
  4. Step 4: Simplify right side
    628,747.80x = 296,978,105,708.10
  5. Step 5: Solve for x
    x = 296,978,105,708.10/628,747.80
  6. Step 6: Final answer
    x = 472,332.64

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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.