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Finding the Fourth Proportional to 722,782.90, 997,439.43 and 400,513.87

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Solution

The fourth proportional to 722,782.90, 997,439.43 and 400,513.87 is: 552,708.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,782.90 : 997,439.43 = 400,513.87 : x
  2. Step 2: Convert to fraction form
    722,782.90/997,439.43 = 400,513.87/x
  3. Step 3: Cross multiply
    722,782.90x = 997,439.43 × 400,513.87
  4. Step 4: Simplify right side
    722,782.90x = 399,488,326,199.89
  5. Step 5: Solve for x
    x = 399,488,326,199.89/722,782.90
  6. Step 6: Final answer
    x = 552,708.60

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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.