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Finding the Fourth Proportional to 670,668.80, 1,006,003.20 and 172,032.80

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Solution

The fourth proportional to 670,668.80, 1,006,003.20 and 172,032.80 is: 258,049.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,668.80 : 1,006,003.20 = 172,032.80 : x
  2. Step 2: Convert to fraction form
    670,668.80/1,006,003.20 = 172,032.80/x
  3. Step 3: Cross multiply
    670,668.80x = 1,006,003.20 × 172,032.80
  4. Step 4: Simplify right side
    670,668.80x = 173,065,547,304.96
  5. Step 5: Solve for x
    x = 173,065,547,304.96/670,668.80
  6. Step 6: Final answer
    x = 258,049.20

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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.