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Finding the Fourth Proportional to 281,429.69, 388,431.63 and 258,732.74

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Solution

The fourth proportional to 281,429.69, 388,431.63 and 258,732.74 is: 357,105.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,429.69 : 388,431.63 = 258,732.74 : x
  2. Step 2: Convert to fraction form
    281,429.69/388,431.63 = 258,732.74/x
  3. Step 3: Cross multiply
    281,429.69x = 388,431.63 × 258,732.74
  4. Step 4: Simplify right side
    281,429.69x = 100,499,977,990.41
  5. Step 5: Solve for x
    x = 100,499,977,990.41/281,429.69
  6. Step 6: Final answer
    x = 357,105.11

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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.