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Finding the Fourth Proportional to 642,404.80, 963,607.20 and 376,465.60

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Solution

The fourth proportional to 642,404.80, 963,607.20 and 376,465.60 is: 564,698.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,404.80 : 963,607.20 = 376,465.60 : x
  2. Step 2: Convert to fraction form
    642,404.80/963,607.20 = 376,465.60/x
  3. Step 3: Cross multiply
    642,404.80x = 963,607.20 × 376,465.60
  4. Step 4: Simplify right side
    642,404.80x = 362,764,962,712.32
  5. Step 5: Solve for x
    x = 362,764,962,712.32/642,404.80
  6. Step 6: Final answer
    x = 564,698.40

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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.