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Finding the Fourth Proportional to 287,167.24, 430,820.22 and 90,175.24

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Solution

The fourth proportional to 287,167.24, 430,820.22 and 90,175.24 is: 135,284.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,167.24 : 430,820.22 = 90,175.24 : x
  2. Step 2: Convert to fraction form
    287,167.24/430,820.22 = 90,175.24/x
  3. Step 3: Cross multiply
    287,167.24x = 430,820.22 × 90,175.24
  4. Step 4: Simplify right side
    287,167.24x = 38,849,316,735.35
  5. Step 5: Solve for x
    x = 38,849,316,735.35/287,167.24
  6. Step 6: Final answer
    x = 135,284.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.