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Finding the Fourth Proportional to 287,805.30, 397,161.48 and 158,748.90

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Solution

The fourth proportional to 287,805.30, 397,161.48 and 158,748.90 is: 219,068.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,805.30 : 397,161.48 = 158,748.90 : x
  2. Step 2: Convert to fraction form
    287,805.30/397,161.48 = 158,748.90/x
  3. Step 3: Cross multiply
    287,805.30x = 397,161.48 × 158,748.90
  4. Step 4: Simplify right side
    287,805.30x = 63,048,948,072.37
  5. Step 5: Solve for x
    x = 63,048,948,072.37/287,805.30
  6. Step 6: Final answer
    x = 219,068.06

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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.