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Finding the Fourth Proportional to 500,569.88, 690,803.70 and 274,215.40

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Solution

The fourth proportional to 500,569.88, 690,803.70 and 274,215.40 is: 378,426.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,569.88 : 690,803.70 = 274,215.40 : x
  2. Step 2: Convert to fraction form
    500,569.88/690,803.70 = 274,215.40/x
  3. Step 3: Cross multiply
    500,569.88x = 690,803.70 × 274,215.40
  4. Step 4: Simplify right side
    500,569.88x = 189,429,012,916.98
  5. Step 5: Solve for x
    x = 189,429,012,916.98/500,569.88
  6. Step 6: Final answer
    x = 378,426.71

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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.