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Finding the Fourth Proportional to 315,532.58, 435,435.51 and 172,289.57

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Solution

The fourth proportional to 315,532.58, 435,435.51 and 172,289.57 is: 237,759.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,532.58 : 435,435.51 = 172,289.57 : x
  2. Step 2: Convert to fraction form
    315,532.58/435,435.51 = 172,289.57/x
  3. Step 3: Cross multiply
    315,532.58x = 435,435.51 × 172,289.57
  4. Step 4: Simplify right side
    315,532.58x = 75,020,996,780.63
  5. Step 5: Solve for x
    x = 75,020,996,780.63/315,532.58
  6. Step 6: Final answer
    x = 237,759.91

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1.5x scale

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.