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Finding the Fourth Proportional to 315,443.70, 435,322.62 and 172,211.40

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Solution

The fourth proportional to 315,443.70, 435,322.62 and 172,211.40 is: 237,657.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,443.70 : 435,322.62 = 172,211.40 : x
  2. Step 2: Convert to fraction form
    315,443.70/435,322.62 = 172,211.40/x
  3. Step 3: Cross multiply
    315,443.70x = 435,322.62 × 172,211.40
  4. Step 4: Simplify right side
    315,443.70x = 74,967,517,841.87
  5. Step 5: Solve for x
    x = 74,967,517,841.87/315,443.70
  6. Step 6: Final answer
    x = 237,657.36

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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.