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Finding the Fourth Proportional to 287,862.80, 431,405.40 and 192,822.80

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Solution

The fourth proportional to 287,862.80, 431,405.40 and 192,822.80 is: 288,973.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,862.80 : 431,405.40 = 192,822.80 : x
  2. Step 2: Convert to fraction form
    287,862.80/431,405.40 = 192,822.80/x
  3. Step 3: Cross multiply
    287,862.80x = 431,405.40 × 192,822.80
  4. Step 4: Simplify right side
    287,862.80x = 83,184,797,163.12
  5. Step 5: Solve for x
    x = 83,184,797,163.12/287,862.80
  6. Step 6: Final answer
    x = 288,973.77

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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.