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Finding the Fourth Proportional to 312,220.32, 430,864.64 and 168,981.60

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Solution

The fourth proportional to 312,220.32, 430,864.64 and 168,981.60 is: 233,194.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,220.32 : 430,864.64 = 168,981.60 : x
  2. Step 2: Convert to fraction form
    312,220.32/430,864.64 = 168,981.60/x
  3. Step 3: Cross multiply
    312,220.32x = 430,864.64 × 168,981.60
  4. Step 4: Simplify right side
    312,220.32x = 72,808,196,250.62
  5. Step 5: Solve for x
    x = 72,808,196,250.62/312,220.32
  6. Step 6: Final answer
    x = 233,194.93

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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.