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Finding the Fourth Proportional to 281,253.84, 388,128.02 and 153,929.13

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Solution

The fourth proportional to 281,253.84, 388,128.02 and 153,929.13 is: 212,420.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,253.84 : 388,128.02 = 153,929.13 : x
  2. Step 2: Convert to fraction form
    281,253.84/388,128.02 = 153,929.13/x
  3. Step 3: Cross multiply
    281,253.84x = 388,128.02 × 153,929.13
  4. Step 4: Simplify right side
    281,253.84x = 59,744,207,677.58
  5. Step 5: Solve for x
    x = 59,744,207,677.58/281,253.84
  6. Step 6: Final answer
    x = 212,420.95

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1.5x scale

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.