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Finding the Fourth Proportional to 520,103.79, 717,689.70 and 356,900.22

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Solution

The fourth proportional to 520,103.79, 717,689.70 and 356,900.22 is: 492,485.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,103.79 : 717,689.70 = 356,900.22 : x
  2. Step 2: Convert to fraction form
    520,103.79/717,689.70 = 356,900.22/x
  3. Step 3: Cross multiply
    520,103.79x = 717,689.70 × 356,900.22
  4. Step 4: Simplify right side
    520,103.79x = 256,143,611,821.73
  5. Step 5: Solve for x
    x = 256,143,611,821.73/520,103.79
  6. Step 6: Final answer
    x = 492,485.57

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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.