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Finding the Fourth Proportional to 610,630.40, 915,945.60 and 211,138.40

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Solution

The fourth proportional to 610,630.40, 915,945.60 and 211,138.40 is: 316,707.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,630.40 : 915,945.60 = 211,138.40 : x
  2. Step 2: Convert to fraction form
    610,630.40/915,945.60 = 211,138.40/x
  3. Step 3: Cross multiply
    610,630.40x = 915,945.60 × 211,138.40
  4. Step 4: Simplify right side
    610,630.40x = 193,391,288,471.04
  5. Step 5: Solve for x
    x = 193,391,288,471.04/610,630.40
  6. Step 6: Final answer
    x = 316,707.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.