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Finding the Fourth Proportional to 671,318.40, 1,007,528.40 and 666,069.60

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Solution

The fourth proportional to 671,318.40, 1,007,528.40 and 666,069.60 is: 999,650.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,318.40 : 1,007,528.40 = 666,069.60 : x
  2. Step 2: Convert to fraction form
    671,318.40/1,007,528.40 = 666,069.60/x
  3. Step 3: Cross multiply
    671,318.40x = 1,007,528.40 × 666,069.60
  4. Step 4: Simplify right side
    671,318.40x = 671,084,038,376.64
  5. Step 5: Solve for x
    x = 671,084,038,376.64/671,318.40
  6. Step 6: Final answer
    x = 999,650.89

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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.