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Finding the Fourth Proportional to 645,945.60, 974,985.70 and 645,945.60

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Solution

The fourth proportional to 645,945.60, 974,985.70 and 645,945.60 is: 974,985.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,945.60 : 974,985.70 = 645,945.60 : x
  2. Step 2: Convert to fraction form
    645,945.60/974,985.70 = 645,945.60/x
  3. Step 3: Cross multiply
    645,945.60x = 974,985.70 × 645,945.60
  4. Step 4: Simplify right side
    645,945.60x = 629,787,722,977.92
  5. Step 5: Solve for x
    x = 629,787,722,977.92/645,945.60
  6. Step 6: Final answer
    x = 974,985.70

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.