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Finding the Fourth Proportional to 312,220.80, 430,864.20 and 168,980.76

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Solution

The fourth proportional to 312,220.80, 430,864.20 and 168,980.76 is: 233,193.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,220.80 : 430,864.20 = 168,980.76 : x
  2. Step 2: Convert to fraction form
    312,220.80/430,864.20 = 168,980.76/x
  3. Step 3: Cross multiply
    312,220.80x = 430,864.20 × 168,980.76
  4. Step 4: Simplify right side
    312,220.80x = 72,807,759,972.79
  5. Step 5: Solve for x
    x = 72,807,759,972.79/312,220.80
  6. Step 6: Final answer
    x = 233,193.18

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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.