Home / 429,271.40-643,292.70-297,789.80

Finding the Fourth Proportional to 429,271.40, 643,292.70 and 297,789.80

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Solution

The fourth proportional to 429,271.40, 643,292.70 and 297,789.80 is: 446,258.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,271.40 : 643,292.70 = 297,789.80 : x
  2. Step 2: Convert to fraction form
    429,271.40/643,292.70 = 297,789.80/x
  3. Step 3: Cross multiply
    429,271.40x = 643,292.70 × 297,789.80
  4. Step 4: Simplify right side
    429,271.40x = 191,566,004,474.46
  5. Step 5: Solve for x
    x = 191,566,004,474.46/429,271.40
  6. Step 6: Final answer
    x = 446,258.48

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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.