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Finding the Fourth Proportional to 287,938.90, 397,352.97 and 158,878.54

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Solution

The fourth proportional to 287,938.90, 397,352.97 and 158,878.54 is: 219,250.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,938.90 : 397,352.97 = 158,878.54 : x
  2. Step 2: Convert to fraction form
    287,938.90/397,352.97 = 158,878.54/x
  3. Step 3: Cross multiply
    287,938.90x = 397,352.97 × 158,878.54
  4. Step 4: Simplify right side
    287,938.90x = 63,130,859,738.26
  5. Step 5: Solve for x
    x = 63,130,859,738.26/287,938.90
  6. Step 6: Final answer
    x = 219,250.89

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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.