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Finding the Fourth Proportional to 315,862.77, 435,890.87 and 172,622.84

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Solution

The fourth proportional to 315,862.77, 435,890.87 and 172,622.84 is: 238,219.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,862.77 : 435,890.87 = 172,622.84 : x
  2. Step 2: Convert to fraction form
    315,862.77/435,890.87 = 172,622.84/x
  3. Step 3: Cross multiply
    315,862.77x = 435,890.87 × 172,622.84
  4. Step 4: Simplify right side
    315,862.77x = 75,244,716,866.90
  5. Step 5: Solve for x
    x = 75,244,716,866.90/315,862.77
  6. Step 6: Final answer
    x = 238,219.64

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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.