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Finding the Fourth Proportional to 665,884.89, 918,921.15 and 364,078.89

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Solution

The fourth proportional to 665,884.89, 918,921.15 and 364,078.89 is: 502,428.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,884.89 : 918,921.15 = 364,078.89 : x
  2. Step 2: Convert to fraction form
    665,884.89/918,921.15 = 364,078.89/x
  3. Step 3: Cross multiply
    665,884.89x = 918,921.15 × 364,078.89
  4. Step 4: Simplify right side
    665,884.89x = 334,559,792,289.52
  5. Step 5: Solve for x
    x = 334,559,792,289.52/665,884.89
  6. Step 6: Final answer
    x = 502,428.87

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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.