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Finding the Fourth Proportional to 480,109.80, 720,164.70 and 426,196.20

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Solution

The fourth proportional to 480,109.80, 720,164.70 and 426,196.20 is: 639,294.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,109.80 : 720,164.70 = 426,196.20 : x
  2. Step 2: Convert to fraction form
    480,109.80/720,164.70 = 426,196.20/x
  3. Step 3: Cross multiply
    480,109.80x = 720,164.70 × 426,196.20
  4. Step 4: Simplify right side
    480,109.80x = 306,931,458,514.14
  5. Step 5: Solve for x
    x = 306,931,458,514.14/480,109.80
  6. Step 6: Final answer
    x = 639,294.30

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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.