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Finding the Fourth Proportional to 247,615.80, 371,423.70 and 219,075.45

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Solution

The fourth proportional to 247,615.80, 371,423.70 and 219,075.45 is: 328,613.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,615.80 : 371,423.70 = 219,075.45 : x
  2. Step 2: Convert to fraction form
    247,615.80/371,423.70 = 219,075.45/x
  3. Step 3: Cross multiply
    247,615.80x = 371,423.70 × 219,075.45
  4. Step 4: Simplify right side
    247,615.80x = 81,369,814,218.17
  5. Step 5: Solve for x
    x = 81,369,814,218.17/247,615.80
  6. Step 6: Final answer
    x = 328,613.18

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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.