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Finding the Fourth Proportional to 643,079.70, 963,963.45 and 376,703.10

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Solution

The fourth proportional to 643,079.70, 963,963.45 and 376,703.10 is: 564,670.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,079.70 : 963,963.45 = 376,703.10 : x
  2. Step 2: Convert to fraction form
    643,079.70/963,963.45 = 376,703.10/x
  3. Step 3: Cross multiply
    643,079.70x = 963,963.45 × 376,703.10
  4. Step 4: Simplify right side
    643,079.70x = 363,128,019,901.70
  5. Step 5: Solve for x
    x = 363,128,019,901.70/643,079.70
  6. Step 6: Final answer
    x = 564,670.32

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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.