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Finding the Fourth Proportional to 721,804.32, 996,064.56 and 399,515.04

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Solution

The fourth proportional to 721,804.32, 996,064.56 and 399,515.04 is: 551,316.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,804.32 : 996,064.56 = 399,515.04 : x
  2. Step 2: Convert to fraction form
    721,804.32/996,064.56 = 399,515.04/x
  3. Step 3: Cross multiply
    721,804.32x = 996,064.56 × 399,515.04
  4. Step 4: Simplify right side
    721,804.32x = 397,942,772,530.98
  5. Step 5: Solve for x
    x = 397,942,772,530.98/721,804.32
  6. Step 6: Final answer
    x = 551,316.70

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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.