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Finding the Fourth Proportional to 287,878.55, 397,291.86 and 167,019.89

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Solution

The fourth proportional to 287,878.55, 397,291.86 and 167,019.89 is: 230,498.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,878.55 : 397,291.86 = 167,019.89 : x
  2. Step 2: Convert to fraction form
    287,878.55/397,291.86 = 167,019.89/x
  3. Step 3: Cross multiply
    287,878.55x = 397,291.86 × 167,019.89
  4. Step 4: Simplify right side
    287,878.55x = 66,355,640,768.64
  5. Step 5: Solve for x
    x = 66,355,640,768.64/287,878.55
  6. Step 6: Final answer
    x = 230,498.74

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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.