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Finding the Fourth Proportional to 678,689.96, 1,017,866.70 and 229,400.90

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Solution

The fourth proportional to 678,689.96, 1,017,866.70 and 229,400.90 is: 344,044.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,689.96 : 1,017,866.70 = 229,400.90 : x
  2. Step 2: Convert to fraction form
    678,689.96/1,017,866.70 = 229,400.90/x
  3. Step 3: Cross multiply
    678,689.96x = 1,017,866.70 × 229,400.90
  4. Step 4: Simplify right side
    678,689.96x = 233,499,537,060.03
  5. Step 5: Solve for x
    x = 233,499,537,060.03/678,689.96
  6. Step 6: Final answer
    x = 344,044.48

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1.5x scale

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.