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Finding the Fourth Proportional to 348,012.50, 522,018.75 and 85,356.50

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Solution

The fourth proportional to 348,012.50, 522,018.75 and 85,356.50 is: 128,034.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,012.50 : 522,018.75 = 85,356.50 : x
  2. Step 2: Convert to fraction form
    348,012.50/522,018.75 = 85,356.50/x
  3. Step 3: Cross multiply
    348,012.50x = 522,018.75 × 85,356.50
  4. Step 4: Simplify right side
    348,012.50x = 44,557,693,434.38
  5. Step 5: Solve for x
    x = 44,557,693,434.38/348,012.50
  6. Step 6: Final answer
    x = 128,034.75

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1.5x scale

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.