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Finding the Fourth Proportional to 572,312.36, 859,311.18 and 320,087

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Solution

The fourth proportional to 572,312.36, 859,311.18 and 320,087 is: 480,601.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,312.36 : 859,311.18 = 320,087 : x
  2. Step 2: Convert to fraction form
    572,312.36/859,311.18 = 320,087/x
  3. Step 3: Cross multiply
    572,312.36x = 859,311.18 × 320,087
  4. Step 4: Simplify right side
    572,312.36x = 275,054,337,672.66
  5. Step 5: Solve for x
    x = 275,054,337,672.66/572,312.36
  6. Step 6: Final answer
    x = 480,601.78

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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.