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Finding the Fourth Proportional to 671,262.60, 1,006,893.90 and 638,603.40

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Solution

The fourth proportional to 671,262.60, 1,006,893.90 and 638,603.40 is: 957,905.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,262.60 : 1,006,893.90 = 638,603.40 : x
  2. Step 2: Convert to fraction form
    671,262.60/1,006,893.90 = 638,603.40/x
  3. Step 3: Cross multiply
    671,262.60x = 1,006,893.90 × 638,603.40
  4. Step 4: Simplify right side
    671,262.60x = 643,005,867,979.26
  5. Step 5: Solve for x
    x = 643,005,867,979.26/671,262.60
  6. Step 6: Final answer
    x = 957,905.10

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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.