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Finding the Fourth Proportional to 671,641.60, 1,007,462.40 and 664,643.20

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Solution

The fourth proportional to 671,641.60, 1,007,462.40 and 664,643.20 is: 996,964.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,641.60 : 1,007,462.40 = 664,643.20 : x
  2. Step 2: Convert to fraction form
    671,641.60/1,007,462.40 = 664,643.20/x
  3. Step 3: Cross multiply
    671,641.60x = 1,007,462.40 × 664,643.20
  4. Step 4: Simplify right side
    671,641.60x = 669,603,033,415.68
  5. Step 5: Solve for x
    x = 669,603,033,415.68/671,641.60
  6. Step 6: Final answer
    x = 996,964.80

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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.