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Finding the Fourth Proportional to 429,280.40, 643,306.20 and 297,798.80

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Solution

The fourth proportional to 429,280.40, 643,306.20 and 297,798.80 is: 446,271.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,280.40 : 643,306.20 = 297,798.80 : x
  2. Step 2: Convert to fraction form
    429,280.40/643,306.20 = 297,798.80/x
  3. Step 3: Cross multiply
    429,280.40x = 643,306.20 × 297,798.80
  4. Step 4: Simplify right side
    429,280.40x = 191,575,814,392.56
  5. Step 5: Solve for x
    x = 191,575,814,392.56/429,280.40
  6. Step 6: Final answer
    x = 446,271.98

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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.