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Finding the Fourth Proportional to 862,854.40, 1,293,763.20 and 442,950.40

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Solution

The fourth proportional to 862,854.40, 1,293,763.20 and 442,950.40 is: 664,159.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,854.40 : 1,293,763.20 = 442,950.40 : x
  2. Step 2: Convert to fraction form
    862,854.40/1,293,763.20 = 442,950.40/x
  3. Step 3: Cross multiply
    862,854.40x = 1,293,763.20 × 442,950.40
  4. Step 4: Simplify right side
    862,854.40x = 573,072,926,945.28
  5. Step 5: Solve for x
    x = 573,072,926,945.28/862,854.40
  6. Step 6: Final answer
    x = 664,159.48

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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.