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Finding the Fourth Proportional to 642,655.20, 963,326.70 and 376,278.60

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Solution

The fourth proportional to 642,655.20, 963,326.70 and 376,278.60 is: 564,033.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,655.20 : 963,326.70 = 376,278.60 : x
  2. Step 2: Convert to fraction form
    642,655.20/963,326.70 = 376,278.60/x
  3. Step 3: Cross multiply
    642,655.20x = 963,326.70 × 376,278.60
  4. Step 4: Simplify right side
    642,655.20x = 362,479,222,018.62
  5. Step 5: Solve for x
    x = 362,479,222,018.62/642,655.20
  6. Step 6: Final answer
    x = 564,033.75

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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.