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Finding the Fourth Proportional to 388,833.39, 536,590.05 and 209,985.39

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Solution

The fourth proportional to 388,833.39, 536,590.05 and 209,985.39 is: 289,779.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,833.39 : 536,590.05 = 209,985.39 : x
  2. Step 2: Convert to fraction form
    388,833.39/536,590.05 = 209,985.39/x
  3. Step 3: Cross multiply
    388,833.39x = 536,590.05 × 209,985.39
  4. Step 4: Simplify right side
    388,833.39x = 112,676,070,919.37
  5. Step 5: Solve for x
    x = 112,676,070,919.37/388,833.39
  6. Step 6: Final answer
    x = 289,779.82

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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.