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Finding the Fourth Proportional to 722,689.08, 997,318.94 and 400,404.25

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Solution

The fourth proportional to 722,689.08, 997,318.94 and 400,404.25 is: 552,562.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,689.08 : 997,318.94 = 400,404.25 : x
  2. Step 2: Convert to fraction form
    722,689.08/997,318.94 = 400,404.25/x
  3. Step 3: Cross multiply
    722,689.08x = 997,318.94 × 400,404.25
  4. Step 4: Simplify right side
    722,689.08x = 399,330,742,181.50
  5. Step 5: Solve for x
    x = 399,330,742,181.50/722,689.08
  6. Step 6: Final answer
    x = 552,562.30

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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.