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Finding the Fourth Proportional to 429,266.80, 643,900.20 and 192,617.20

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Solution

The fourth proportional to 429,266.80, 643,900.20 and 192,617.20 is: 288,925.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,266.80 : 643,900.20 = 192,617.20 : x
  2. Step 2: Convert to fraction form
    429,266.80/643,900.20 = 192,617.20/x
  3. Step 3: Cross multiply
    429,266.80x = 643,900.20 × 192,617.20
  4. Step 4: Simplify right side
    429,266.80x = 124,026,253,603.44
  5. Step 5: Solve for x
    x = 124,026,253,603.44/429,266.80
  6. Step 6: Final answer
    x = 288,925.80

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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.