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Finding the Fourth Proportional to 505,404, 696,626.94 and 358,279

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Solution

The fourth proportional to 505,404, 696,626.94 and 358,279 is: 493,836.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,404 : 696,626.94 = 358,279 : x
  2. Step 2: Convert to fraction form
    505,404/696,626.94 = 358,279/x
  3. Step 3: Cross multiply
    505,404x = 696,626.94 × 358,279
  4. Step 4: Simplify right side
    505,404x = 249,586,803,436.26
  5. Step 5: Solve for x
    x = 249,586,803,436.26/505,404
  6. Step 6: Final answer
    x = 493,836.22

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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.