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Finding the Fourth Proportional to 500,521.19, 690,719.54 and 274,170.47

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Solution

The fourth proportional to 500,521.19, 690,719.54 and 274,170.47 is: 378,355.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,521.19 : 690,719.54 = 274,170.47 : x
  2. Step 2: Convert to fraction form
    500,521.19/690,719.54 = 274,170.47/x
  3. Step 3: Cross multiply
    500,521.19x = 690,719.54 × 274,170.47
  4. Step 4: Simplify right side
    500,521.19x = 189,374,899,549.13
  5. Step 5: Solve for x
    x = 189,374,899,549.13/500,521.19
  6. Step 6: Final answer
    x = 378,355.41

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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.