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Finding the Fourth Proportional to 518,112, 715,305.60 and 339,575.04

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Solution

The fourth proportional to 518,112, 715,305.60 and 339,575.04 is: 468,817.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,112 : 715,305.60 = 339,575.04 : x
  2. Step 2: Convert to fraction form
    518,112/715,305.60 = 339,575.04/x
  3. Step 3: Cross multiply
    518,112x = 715,305.60 × 339,575.04
  4. Step 4: Simplify right side
    518,112x = 242,899,927,732.22
  5. Step 5: Solve for x
    x = 242,899,927,732.22/518,112
  6. Step 6: Final answer
    x = 468,817.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.