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Finding the Fourth Proportional to 500,559.39, 690,789.21 and 274,204.89

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Solution

The fourth proportional to 500,559.39, 690,789.21 and 274,204.89 is: 378,412.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,559.39 : 690,789.21 = 274,204.89 : x
  2. Step 2: Convert to fraction form
    500,559.39/690,789.21 = 274,204.89/x
  3. Step 3: Cross multiply
    500,559.39x = 690,789.21 × 274,204.89
  4. Step 4: Simplify right side
    500,559.39x = 189,417,779,341.24
  5. Step 5: Solve for x
    x = 189,417,779,341.24/500,559.39
  6. Step 6: Final answer
    x = 378,412.20

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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.