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Finding the Fourth Proportional to 397,639.80, 596,459.70 and 368,771.40

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Solution

The fourth proportional to 397,639.80, 596,459.70 and 368,771.40 is: 553,157.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,639.80 : 596,459.70 = 368,771.40 : x
  2. Step 2: Convert to fraction form
    397,639.80/596,459.70 = 368,771.40/x
  3. Step 3: Cross multiply
    397,639.80x = 596,459.70 × 368,771.40
  4. Step 4: Simplify right side
    397,639.80x = 219,957,278,612.58
  5. Step 5: Solve for x
    x = 219,957,278,612.58/397,639.80
  6. Step 6: Final answer
    x = 553,157.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.