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Finding the Fourth Proportional to 578,156.40, 867,234.60 and 157,431.60

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Solution

The fourth proportional to 578,156.40, 867,234.60 and 157,431.60 is: 236,147.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,156.40 : 867,234.60 = 157,431.60 : x
  2. Step 2: Convert to fraction form
    578,156.40/867,234.60 = 157,431.60/x
  3. Step 3: Cross multiply
    578,156.40x = 867,234.60 × 157,431.60
  4. Step 4: Simplify right side
    578,156.40x = 136,530,130,653.36
  5. Step 5: Solve for x
    x = 136,530,130,653.36/578,156.40
  6. Step 6: Final answer
    x = 236,147.40

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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.