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Finding the Fourth Proportional to 644,280.62, 889,082.91 and 357,819.16

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Solution

The fourth proportional to 644,280.62, 889,082.91 and 357,819.16 is: 493,776.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,280.62 : 889,082.91 = 357,819.16 : x
  2. Step 2: Convert to fraction form
    644,280.62/889,082.91 = 357,819.16/x
  3. Step 3: Cross multiply
    644,280.62x = 889,082.91 × 357,819.16
  4. Step 4: Simplify right side
    644,280.62x = 318,130,897,803.85
  5. Step 5: Solve for x
    x = 318,130,897,803.85/644,280.62
  6. Step 6: Final answer
    x = 493,776.92

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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.