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Finding the Fourth Proportional to 722,355.12, 996,858.90 and 400,070.70

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Solution

The fourth proportional to 722,355.12, 996,858.90 and 400,070.70 is: 552,102.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,355.12 : 996,858.90 = 400,070.70 : x
  2. Step 2: Convert to fraction form
    722,355.12/996,858.90 = 400,070.70/x
  3. Step 3: Cross multiply
    722,355.12x = 996,858.90 × 400,070.70
  4. Step 4: Simplify right side
    722,355.12x = 398,814,037,924.23
  5. Step 5: Solve for x
    x = 398,814,037,924.23/722,355.12
  6. Step 6: Final answer
    x = 552,102.46

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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.