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Finding the Fourth Proportional to 676,363.12, 933,169.80 and 389,844.28

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Solution

The fourth proportional to 676,363.12, 933,169.80 and 389,844.28 is: 537,863.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,363.12 : 933,169.80 = 389,844.28 : x
  2. Step 2: Convert to fraction form
    676,363.12/933,169.80 = 389,844.28/x
  3. Step 3: Cross multiply
    676,363.12x = 933,169.80 × 389,844.28
  4. Step 4: Simplify right side
    676,363.12x = 363,790,908,798.74
  5. Step 5: Solve for x
    x = 363,790,908,798.74/676,363.12
  6. Step 6: Final answer
    x = 537,863.31

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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.