Home / 643,929.60-964,972.80-446,707.20

Finding the Fourth Proportional to 643,929.60, 964,972.80 and 446,707.20

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Solution

The fourth proportional to 643,929.60, 964,972.80 and 446,707.20 is: 669,421.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,929.60 : 964,972.80 = 446,707.20 : x
  2. Step 2: Convert to fraction form
    643,929.60/964,972.80 = 446,707.20/x
  3. Step 3: Cross multiply
    643,929.60x = 964,972.80 × 446,707.20
  4. Step 4: Simplify right side
    643,929.60x = 431,060,297,564.16
  5. Step 5: Solve for x
    x = 431,060,297,564.16/643,929.60
  6. Step 6: Final answer
    x = 669,421.47

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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.