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Finding the Fourth Proportional to 642,611.70, 963,261.45 and 376,235.10

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Solution

The fourth proportional to 642,611.70, 963,261.45 and 376,235.10 is: 563,968.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,611.70 : 963,261.45 = 376,235.10 : x
  2. Step 2: Convert to fraction form
    642,611.70/963,261.45 = 376,235.10/x
  3. Step 3: Cross multiply
    642,611.70x = 963,261.45 × 376,235.10
  4. Step 4: Simplify right side
    642,611.70x = 362,412,767,966.90
  5. Step 5: Solve for x
    x = 362,412,767,966.90/642,611.70
  6. Step 6: Final answer
    x = 563,968.52

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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.