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Finding the Fourth Proportional to 641,989.72, 963,172.07 and 286,920.71

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Solution

The fourth proportional to 641,989.72, 963,172.07 and 286,920.71 is: 430,464.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,989.72 : 963,172.07 = 286,920.71 : x
  2. Step 2: Convert to fraction form
    641,989.72/963,172.07 = 286,920.71/x
  3. Step 3: Cross multiply
    641,989.72x = 963,172.07 × 286,920.71
  4. Step 4: Simplify right side
    641,989.72x = 276,354,007,926.11
  5. Step 5: Solve for x
    x = 276,354,007,926.11/641,989.72
  6. Step 6: Final answer
    x = 430,464.85

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1.5x scale

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.