Home / 970,123.13-1,339,324.83-643,878.56

Finding the Fourth Proportional to 970,123.13, 1,339,324.83 and 643,878.56

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Solution

The fourth proportional to 970,123.13, 1,339,324.83 and 643,878.56 is: 888,920.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    970,123.13 : 1,339,324.83 = 643,878.56 : x
  2. Step 2: Convert to fraction form
    970,123.13/1,339,324.83 = 643,878.56/x
  3. Step 3: Cross multiply
    970,123.13x = 1,339,324.83 × 643,878.56
  4. Step 4: Simplify right side
    970,123.13x = 862,362,536,216.02
  5. Step 5: Solve for x
    x = 862,362,536,216.02/970,123.13
  6. Step 6: Final answer
    x = 888,920.71

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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.