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Finding the Fourth Proportional to 518,947.20, 778,420.80 and 294,220.80

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Solution

The fourth proportional to 518,947.20, 778,420.80 and 294,220.80 is: 441,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,947.20 : 778,420.80 = 294,220.80 : x
  2. Step 2: Convert to fraction form
    518,947.20/778,420.80 = 294,220.80/x
  3. Step 3: Cross multiply
    518,947.20x = 778,420.80 × 294,220.80
  4. Step 4: Simplify right side
    518,947.20x = 229,027,590,512.64
  5. Step 5: Solve for x
    x = 229,027,590,512.64/518,947.20
  6. Step 6: Final answer
    x = 441,331.20

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Half scale
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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.