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Finding the Fourth Proportional to 339,595.79, 509,411.13 and 86,878.47

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Solution

The fourth proportional to 339,595.79, 509,411.13 and 86,878.47 is: 130,322.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,595.79 : 509,411.13 = 86,878.47 : x
  2. Step 2: Convert to fraction form
    339,595.79/509,411.13 = 86,878.47/x
  3. Step 3: Cross multiply
    339,595.79x = 509,411.13 × 86,878.47
  4. Step 4: Simplify right side
    339,595.79x = 44,256,858,783.12
  5. Step 5: Solve for x
    x = 44,256,858,783.12/339,595.79
  6. Step 6: Final answer
    x = 130,322.17

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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.