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Finding the Fourth Proportional to 722,710.12, 997,347.90 and 400,425.26

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Solution

The fourth proportional to 722,710.12, 997,347.90 and 400,425.26 is: 552,591.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,710.12 : 997,347.90 = 400,425.26 : x
  2. Step 2: Convert to fraction form
    722,710.12/997,347.90 = 400,425.26/x
  3. Step 3: Cross multiply
    722,710.12x = 997,347.90 × 400,425.26
  4. Step 4: Simplify right side
    722,710.12x = 399,363,292,167.95
  5. Step 5: Solve for x
    x = 399,363,292,167.95/722,710.12
  6. Step 6: Final answer
    x = 552,591.25

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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.