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Finding the Fourth Proportional to 628,776.50, 867,710.13 and 342,298.58

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Solution

The fourth proportional to 628,776.50, 867,710.13 and 342,298.58 is: 472,371.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,776.50 : 867,710.13 = 342,298.58 : x
  2. Step 2: Convert to fraction form
    628,776.50/867,710.13 = 342,298.58/x
  3. Step 3: Cross multiply
    628,776.50x = 867,710.13 × 342,298.58
  4. Step 4: Simplify right side
    628,776.50x = 297,015,945,350.62
  5. Step 5: Solve for x
    x = 297,015,945,350.62/628,776.50
  6. Step 6: Final answer
    x = 472,371.26

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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.