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Finding the Fourth Proportional to 482,965.72, 666,715.62 and 289,465.72

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Solution

The fourth proportional to 482,965.72, 666,715.62 and 289,465.72 is: 399,596.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,965.72 : 666,715.62 = 289,465.72 : x
  2. Step 2: Convert to fraction form
    482,965.72/666,715.62 = 289,465.72/x
  3. Step 3: Cross multiply
    482,965.72x = 666,715.62 × 289,465.72
  4. Step 4: Simplify right side
    482,965.72x = 192,991,316,978.55
  5. Step 5: Solve for x
    x = 192,991,316,978.55/482,965.72
  6. Step 6: Final answer
    x = 399,596.30

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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.