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Finding the Fourth Proportional to 492,079.80, 738,465.30 and 315,017.40

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Solution

The fourth proportional to 492,079.80, 738,465.30 and 315,017.40 is: 472,747.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,079.80 : 738,465.30 = 315,017.40 : x
  2. Step 2: Convert to fraction form
    492,079.80/738,465.30 = 315,017.40/x
  3. Step 3: Cross multiply
    492,079.80x = 738,465.30 × 315,017.40
  4. Step 4: Simplify right side
    492,079.80x = 232,629,418,796.22
  5. Step 5: Solve for x
    x = 232,629,418,796.22/492,079.80
  6. Step 6: Final answer
    x = 472,747.34

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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.