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Finding the Fourth Proportional to 690,280, 1,035,576.85 and 210,550.71

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Solution

The fourth proportional to 690,280, 1,035,576.85 and 210,550.71 is: 315,873.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,280 : 1,035,576.85 = 210,550.71 : x
  2. Step 2: Convert to fraction form
    690,280/1,035,576.85 = 210,550.71/x
  3. Step 3: Cross multiply
    690,280x = 1,035,576.85 × 210,550.71
  4. Step 4: Simplify right side
    690,280x = 218,041,441,027.06
  5. Step 5: Solve for x
    x = 218,041,441,027.06/690,280
  6. Step 6: Final answer
    x = 315,873.91

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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.