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Finding the Fourth Proportional to 878,408.40, 1,314,696.60 and 637,838.40

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Solution

The fourth proportional to 878,408.40, 1,314,696.60 and 637,838.40 is: 954,640.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,408.40 : 1,314,696.60 = 637,838.40 : x
  2. Step 2: Convert to fraction form
    878,408.40/1,314,696.60 = 637,838.40/x
  3. Step 3: Cross multiply
    878,408.40x = 1,314,696.60 × 637,838.40
  4. Step 4: Simplify right side
    878,408.40x = 838,563,975,829.44
  5. Step 5: Solve for x
    x = 838,563,975,829.44/878,408.40
  6. Step 6: Final answer
    x = 954,640.21

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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.