Home / 921,429.87-1,272,221.58-646,372.50

Finding the Fourth Proportional to 921,429.87, 1,272,221.58 and 646,372.50

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Solution

The fourth proportional to 921,429.87, 1,272,221.58 and 646,372.50 is: 892,448.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,429.87 : 1,272,221.58 = 646,372.50 : x
  2. Step 2: Convert to fraction form
    921,429.87/1,272,221.58 = 646,372.50/x
  3. Step 3: Cross multiply
    921,429.87x = 1,272,221.58 × 646,372.50
  4. Step 4: Simplify right side
    921,429.87x = 822,329,043,218.55
  5. Step 5: Solve for x
    x = 822,329,043,218.55/921,429.87
  6. Step 6: Final answer
    x = 892,448.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.