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Finding the Fourth Proportional to 500,523.19, 690,722.30 and 274,172.47

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Solution

The fourth proportional to 500,523.19, 690,722.30 and 274,172.47 is: 378,358.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,523.19 : 690,722.30 = 274,172.47 : x
  2. Step 2: Convert to fraction form
    500,523.19/690,722.30 = 274,172.47/x
  3. Step 3: Cross multiply
    500,523.19x = 690,722.30 × 274,172.47
  4. Step 4: Simplify right side
    500,523.19x = 189,377,039,075.08
  5. Step 5: Solve for x
    x = 189,377,039,075.08/500,523.19
  6. Step 6: Final answer
    x = 378,358.17

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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.