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Finding the Fourth Proportional to 618,959.50, 928,439.26 and 408,548.23

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Solution

The fourth proportional to 618,959.50, 928,439.26 and 408,548.23 is: 612,822.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,959.50 : 928,439.26 = 408,548.23 : x
  2. Step 2: Convert to fraction form
    618,959.50/928,439.26 = 408,548.23/x
  3. Step 3: Cross multiply
    618,959.50x = 928,439.26 × 408,548.23
  4. Step 4: Simplify right side
    618,959.50x = 379,312,212,993.04
  5. Step 5: Solve for x
    x = 379,312,212,993.04/618,959.50
  6. Step 6: Final answer
    x = 612,822.35

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Double scale
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Similar ratio
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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.