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Finding the Fourth Proportional to 642,813.20, 963,563.70 and 376,436.60

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Solution

The fourth proportional to 642,813.20, 963,563.70 and 376,436.60 is: 564,270.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,813.20 : 963,563.70 = 376,436.60 : x
  2. Step 2: Convert to fraction form
    642,813.20/963,563.70 = 376,436.60/x
  3. Step 3: Cross multiply
    642,813.20x = 963,563.70 × 376,436.60
  4. Step 4: Simplify right side
    642,813.20x = 362,720,643,111.42
  5. Step 5: Solve for x
    x = 362,720,643,111.42/642,813.20
  6. Step 6: Final answer
    x = 564,270.68

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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.