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Finding the Fourth Proportional to 676,879.11, 934,119.06 and 386,538.06

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Solution

The fourth proportional to 676,879.11, 934,119.06 and 386,538.06 is: 533,437.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,879.11 : 934,119.06 = 386,538.06 : x
  2. Step 2: Convert to fraction form
    676,879.11/934,119.06 = 386,538.06/x
  3. Step 3: Cross multiply
    676,879.11x = 934,119.06 × 386,538.06
  4. Step 4: Simplify right side
    676,879.11x = 361,072,569,261.42
  5. Step 5: Solve for x
    x = 361,072,569,261.42/676,879.11
  6. Step 6: Final answer
    x = 533,437.31

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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.