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Finding the Fourth Proportional to 281,443.47, 388,403.49 and 154,119.06

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Solution

The fourth proportional to 281,443.47, 388,403.49 and 154,119.06 is: 212,690.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,443.47 : 388,403.49 = 154,119.06 : x
  2. Step 2: Convert to fraction form
    281,443.47/388,403.49 = 154,119.06/x
  3. Step 3: Cross multiply
    281,443.47x = 388,403.49 × 154,119.06
  4. Step 4: Simplify right side
    281,443.47x = 59,860,380,779.52
  5. Step 5: Solve for x
    x = 59,860,380,779.52/281,443.47
  6. Step 6: Final answer
    x = 212,690.60

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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.