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Finding the Fourth Proportional to 315,511.73, 435,423.84 and 172,285.10

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Solution

The fourth proportional to 315,511.73, 435,423.84 and 172,285.10 is: 237,763.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,511.73 : 435,423.84 = 172,285.10 : x
  2. Step 2: Convert to fraction form
    315,511.73/435,423.84 = 172,285.10/x
  3. Step 3: Cross multiply
    315,511.73x = 435,423.84 × 172,285.10
  4. Step 4: Simplify right side
    315,511.73x = 75,017,039,816.78
  5. Step 5: Solve for x
    x = 75,017,039,816.78/315,511.73
  6. Step 6: Final answer
    x = 237,763.08

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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.