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Finding the Fourth Proportional to 319,855.04, 440,815.20 and 212,235.20

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Solution

The fourth proportional to 319,855.04, 440,815.20 and 212,235.20 is: 292,496.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,855.04 : 440,815.20 = 212,235.20 : x
  2. Step 2: Convert to fraction form
    319,855.04/440,815.20 = 212,235.20/x
  3. Step 3: Cross multiply
    319,855.04x = 440,815.20 × 212,235.20
  4. Step 4: Simplify right side
    319,855.04x = 93,556,502,135.04
  5. Step 5: Solve for x
    x = 93,556,502,135.04/319,855.04
  6. Step 6: Final answer
    x = 292,496.57

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1.5x scale

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.