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Finding the Fourth Proportional to 874,994.40, 1,312,491.60 and 815,945.40

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Solution

The fourth proportional to 874,994.40, 1,312,491.60 and 815,945.40 is: 1,223,918.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,994.40 : 1,312,491.60 = 815,945.40 : x
  2. Step 2: Convert to fraction form
    874,994.40/1,312,491.60 = 815,945.40/x
  3. Step 3: Cross multiply
    874,994.40x = 1,312,491.60 × 815,945.40
  4. Step 4: Simplify right side
    874,994.40x = 1,070,921,483,558.64
  5. Step 5: Solve for x
    x = 1,070,921,483,558.64/874,994.40
  6. Step 6: Final answer
    x = 1,223,918.10

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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.