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Finding the Fourth Proportional to 643,008, 887,352.32 and 360,384

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Solution

The fourth proportional to 643,008, 887,352.32 and 360,384 is: 497,330.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,008 : 887,352.32 = 360,384 : x
  2. Step 2: Convert to fraction form
    643,008/887,352.32 = 360,384/x
  3. Step 3: Cross multiply
    643,008x = 887,352.32 × 360,384
  4. Step 4: Simplify right side
    643,008x = 319,787,578,490.88
  5. Step 5: Solve for x
    x = 319,787,578,490.88/643,008
  6. Step 6: Final answer
    x = 497,330.64

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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.