Home / 566,280.20-781,466.80-311,631.39

Finding the Fourth Proportional to 566,280.20, 781,466.80 and 311,631.39

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Solution

The fourth proportional to 566,280.20, 781,466.80 and 311,631.39 is: 430,051.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    566,280.20 : 781,466.80 = 311,631.39 : x
  2. Step 2: Convert to fraction form
    566,280.20/781,466.80 = 311,631.39/x
  3. Step 3: Cross multiply
    566,280.20x = 781,466.80 × 311,631.39
  4. Step 4: Simplify right side
    566,280.20x = 243,529,583,564.70
  5. Step 5: Solve for x
    x = 243,529,583,564.70/566,280.20
  6. Step 6: Final answer
    x = 430,051.38

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.