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Finding the Fourth Proportional to 628,838.13, 867,752.85 and 356,911.57

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Solution

The fourth proportional to 628,838.13, 867,752.85 and 356,911.57 is: 492,513.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,838.13 : 867,752.85 = 356,911.57 : x
  2. Step 2: Convert to fraction form
    628,838.13/867,752.85 = 356,911.57/x
  3. Step 3: Cross multiply
    628,838.13x = 867,752.85 × 356,911.57
  4. Step 4: Simplify right side
    628,838.13x = 309,711,027,599.85
  5. Step 5: Solve for x
    x = 309,711,027,599.85/628,838.13
  6. Step 6: Final answer
    x = 492,513.11

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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.