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Finding the Fourth Proportional to 310,726.40, 465,859.20 and 210,636.80

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Solution

The fourth proportional to 310,726.40, 465,859.20 and 210,636.80 is: 315,799.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,726.40 : 465,859.20 = 210,636.80 : x
  2. Step 2: Convert to fraction form
    310,726.40/465,859.20 = 210,636.80/x
  3. Step 3: Cross multiply
    310,726.40x = 465,859.20 × 210,636.80
  4. Step 4: Simplify right side
    310,726.40x = 98,127,091,138.56
  5. Step 5: Solve for x
    x = 98,127,091,138.56/310,726.40
  6. Step 6: Final answer
    x = 315,799.02

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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.