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Finding the Fourth Proportional to 287,637.95, 431,679.71 and 231,615.25

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Solution

The fourth proportional to 287,637.95, 431,679.71 and 231,615.25 is: 347,602.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,637.95 : 431,679.71 = 231,615.25 : x
  2. Step 2: Convert to fraction form
    287,637.95/431,679.71 = 231,615.25/x
  3. Step 3: Cross multiply
    287,637.95x = 431,679.71 × 231,615.25
  4. Step 4: Simplify right side
    287,637.95x = 99,983,603,451.42
  5. Step 5: Solve for x
    x = 99,983,603,451.42/287,637.95
  6. Step 6: Final answer
    x = 347,602.26

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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.