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Finding the Fourth Proportional to 348,344, 522,518.56 and 85,688

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Solution

The fourth proportional to 348,344, 522,518.56 and 85,688 is: 128,532.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,344 : 522,518.56 = 85,688 : x
  2. Step 2: Convert to fraction form
    348,344/522,518.56 = 85,688/x
  3. Step 3: Cross multiply
    348,344x = 522,518.56 × 85,688
  4. Step 4: Simplify right side
    348,344x = 44,773,570,369.28
  5. Step 5: Solve for x
    x = 44,773,570,369.28/348,344
  6. Step 6: Final answer
    x = 128,532.63

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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.