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Finding the Fourth Proportional to 287,810.55, 397,181.45 and 158,754.54

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Solution

The fourth proportional to 287,810.55, 397,181.45 and 158,754.54 is: 219,082.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,810.55 : 397,181.45 = 158,754.54 : x
  2. Step 2: Convert to fraction form
    287,810.55/397,181.45 = 158,754.54/x
  3. Step 3: Cross multiply
    287,810.55x = 397,181.45 × 158,754.54
  4. Step 4: Simplify right side
    287,810.55x = 63,054,357,597.51
  5. Step 5: Solve for x
    x = 63,054,357,597.51/287,810.55
  6. Step 6: Final answer
    x = 219,082.86

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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.