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Finding the Fourth Proportional to 429,415.20, 644,122.80 and 404,920.80

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Solution

The fourth proportional to 429,415.20, 644,122.80 and 404,920.80 is: 607,381.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,415.20 : 644,122.80 = 404,920.80 : x
  2. Step 2: Convert to fraction form
    429,415.20/644,122.80 = 404,920.80/x
  3. Step 3: Cross multiply
    429,415.20x = 644,122.80 × 404,920.80
  4. Step 4: Simplify right side
    429,415.20x = 260,818,719,474.24
  5. Step 5: Solve for x
    x = 260,818,719,474.24/429,415.20
  6. Step 6: Final answer
    x = 607,381.20

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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.