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Finding the Fourth Proportional to 287,157.54, 396,261.88 and 158,070.88

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Solution

The fourth proportional to 287,157.54, 396,261.88 and 158,070.88 is: 218,129.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,157.54 : 396,261.88 = 158,070.88 : x
  2. Step 2: Convert to fraction form
    287,157.54/396,261.88 = 158,070.88/x
  3. Step 3: Cross multiply
    287,157.54x = 396,261.88 × 158,070.88
  4. Step 4: Simplify right side
    287,157.54x = 62,637,464,082.05
  5. Step 5: Solve for x
    x = 62,637,464,082.05/287,157.54
  6. Step 6: Final answer
    x = 218,129.27

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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.