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Finding the Fourth Proportional to 671,663.90, 1,008,046.65 and 666,415.10

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Solution

The fourth proportional to 671,663.90, 1,008,046.65 and 666,415.10 is: 1,000,169.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,663.90 : 1,008,046.65 = 666,415.10 : x
  2. Step 2: Convert to fraction form
    671,663.90/1,008,046.65 = 666,415.10/x
  3. Step 3: Cross multiply
    671,663.90x = 1,008,046.65 × 666,415.10
  4. Step 4: Simplify right side
    671,663.90x = 671,777,509,064.42
  5. Step 5: Solve for x
    x = 671,777,509,064.42/671,663.90
  6. Step 6: Final answer
    x = 1,000,169.15

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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.