Home / 642,736.10-963,715.35-287,683.94

Finding the Fourth Proportional to 642,736.10, 963,715.35 and 287,683.94

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Solution

The fourth proportional to 642,736.10, 963,715.35 and 287,683.94 is: 431,351.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,736.10 : 963,715.35 = 287,683.94 : x
  2. Step 2: Convert to fraction form
    642,736.10/963,715.35 = 287,683.94/x
  3. Step 3: Cross multiply
    642,736.10x = 963,715.35 × 287,683.94
  4. Step 4: Simplify right side
    642,736.10x = 277,245,428,926.48
  5. Step 5: Solve for x
    x = 277,245,428,926.48/642,736.10
  6. Step 6: Final answer
    x = 431,351.89

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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.