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Finding the Fourth Proportional to 315,318.50, 435,148.71 and 172,087.70

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Solution

The fourth proportional to 315,318.50, 435,148.71 and 172,087.70 is: 237,486.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,318.50 : 435,148.71 = 172,087.70 : x
  2. Step 2: Convert to fraction form
    315,318.50/435,148.71 = 172,087.70/x
  3. Step 3: Cross multiply
    315,318.50x = 435,148.71 × 172,087.70
  4. Step 4: Simplify right side
    315,318.50x = 74,883,740,661.87
  5. Step 5: Solve for x
    x = 74,883,740,661.87/315,318.50
  6. Step 6: Final answer
    x = 237,486.04

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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.