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Finding the Fourth Proportional to 722,691.58, 997,322.40 and 400,406.75

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Solution

The fourth proportional to 722,691.58, 997,322.40 and 400,406.75 is: 552,565.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,691.58 : 997,322.40 = 400,406.75 : x
  2. Step 2: Convert to fraction form
    722,691.58/997,322.40 = 400,406.75/x
  3. Step 3: Cross multiply
    722,691.58x = 997,322.40 × 400,406.75
  4. Step 4: Simplify right side
    722,691.58x = 399,334,620,886.20
  5. Step 5: Solve for x
    x = 399,334,620,886.20/722,691.58
  6. Step 6: Final answer
    x = 552,565.76

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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.