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Finding the Fourth Proportional to 256,485.70, 384,728.55 and 162,007.30

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Solution

The fourth proportional to 256,485.70, 384,728.55 and 162,007.30 is: 243,010.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,485.70 : 384,728.55 = 162,007.30 : x
  2. Step 2: Convert to fraction form
    256,485.70/384,728.55 = 162,007.30/x
  3. Step 3: Cross multiply
    256,485.70x = 384,728.55 × 162,007.30
  4. Step 4: Simplify right side
    256,485.70x = 62,328,833,618.42
  5. Step 5: Solve for x
    x = 62,328,833,618.42/256,485.70
  6. Step 6: Final answer
    x = 243,010.95

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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.