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Finding the Fourth Proportional to 519,280.80, 778,921.20 and 294,410.40

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Solution

The fourth proportional to 519,280.80, 778,921.20 and 294,410.40 is: 441,615.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,280.80 : 778,921.20 = 294,410.40 : x
  2. Step 2: Convert to fraction form
    519,280.80/778,921.20 = 294,410.40/x
  3. Step 3: Cross multiply
    519,280.80x = 778,921.20 × 294,410.40
  4. Step 4: Simplify right side
    519,280.80x = 229,322,502,060.48
  5. Step 5: Solve for x
    x = 229,322,502,060.48/519,280.80
  6. Step 6: Final answer
    x = 441,615.60

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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.