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Finding the Fourth Proportional to 722,959.21, 997,683.69 and 400,717.72

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Solution

The fourth proportional to 722,959.21, 997,683.69 and 400,717.72 is: 552,990.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,959.21 : 997,683.69 = 400,717.72 : x
  2. Step 2: Convert to fraction form
    722,959.21/997,683.69 = 400,717.72/x
  3. Step 3: Cross multiply
    722,959.21x = 997,683.69 × 400,717.72
  4. Step 4: Simplify right side
    722,959.21x = 399,789,533,537.99
  5. Step 5: Solve for x
    x = 399,789,533,537.99/722,959.21
  6. Step 6: Final answer
    x = 552,990.44

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1.5x scale

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.