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Finding the Fourth Proportional to 671,696.40, 1,008,095.40 and 666,447.60

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Solution

The fourth proportional to 671,696.40, 1,008,095.40 and 666,447.60 is: 1,000,217.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,696.40 : 1,008,095.40 = 666,447.60 : x
  2. Step 2: Convert to fraction form
    671,696.40/1,008,095.40 = 666,447.60/x
  3. Step 3: Cross multiply
    671,696.40x = 1,008,095.40 × 666,447.60
  4. Step 4: Simplify right side
    671,696.40x = 671,842,759,901.04
  5. Step 5: Solve for x
    x = 671,842,759,901.04/671,696.40
  6. Step 6: Final answer
    x = 1,000,217.90

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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.