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Finding the Fourth Proportional to 315,615.20, 473,422.80 and 245,112.80

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Solution

The fourth proportional to 315,615.20, 473,422.80 and 245,112.80 is: 367,669.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,615.20 : 473,422.80 = 245,112.80 : x
  2. Step 2: Convert to fraction form
    315,615.20/473,422.80 = 245,112.80/x
  3. Step 3: Cross multiply
    315,615.20x = 473,422.80 × 245,112.80
  4. Step 4: Simplify right side
    315,615.20x = 116,041,988,091.84
  5. Step 5: Solve for x
    x = 116,041,988,091.84/315,615.20
  6. Step 6: Final answer
    x = 367,669.20

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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.