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Finding the Fourth Proportional to 643,514.80, 965,272.20 and 539,316.40

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Solution

The fourth proportional to 643,514.80, 965,272.20 and 539,316.40 is: 808,974.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,514.80 : 965,272.20 = 539,316.40 : x
  2. Step 2: Convert to fraction form
    643,514.80/965,272.20 = 539,316.40/x
  3. Step 3: Cross multiply
    643,514.80x = 965,272.20 × 539,316.40
  4. Step 4: Simplify right side
    643,514.80x = 520,587,127,924.08
  5. Step 5: Solve for x
    x = 520,587,127,924.08/643,514.80
  6. Step 6: Final answer
    x = 808,974.60

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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.