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Finding the Fourth Proportional to 698.02, 1,045.95 and 286.81

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Solution

The fourth proportional to 698.02, 1,045.95 and 286.81 is: 429.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.02 : 1,045.95 = 286.81 : x
  2. Step 2: Convert to fraction form
    698.02/1,045.95 = 286.81/x
  3. Step 3: Cross multiply
    698.02x = 1,045.95 × 286.81
  4. Step 4: Simplify right side
    698.02x = 299,988.92
  5. Step 5: Solve for x
    x = 299,988.92/698.02
  6. Step 6: Final answer
    x = 429.77

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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.