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Finding the Fourth Proportional to 524,587.80, 785,715.30 and 405,874.20

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Solution

The fourth proportional to 524,587.80, 785,715.30 and 405,874.20 is: 607,908.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    524,587.80 : 785,715.30 = 405,874.20 : x
  2. Step 2: Convert to fraction form
    524,587.80/785,715.30 = 405,874.20/x
  3. Step 3: Cross multiply
    524,587.80x = 785,715.30 × 405,874.20
  4. Step 4: Simplify right side
    524,587.80x = 318,901,568,815.26
  5. Step 5: Solve for x
    x = 318,901,568,815.26/524,587.80
  6. Step 6: Final answer
    x = 607,908.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.