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Finding the Fourth Proportional to 506,384.10, 698,708.97 and 279,985.86

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Solution

The fourth proportional to 506,384.10, 698,708.97 and 279,985.86 is: 386,324.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    506,384.10 : 698,708.97 = 279,985.86 : x
  2. Step 2: Convert to fraction form
    506,384.10/698,708.97 = 279,985.86/x
  3. Step 3: Cross multiply
    506,384.10x = 698,708.97 × 279,985.86
  4. Step 4: Simplify right side
    506,384.10x = 195,628,631,855.16
  5. Step 5: Solve for x
    x = 195,628,631,855.16/506,384.10
  6. Step 6: Final answer
    x = 386,324.59

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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.