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Finding the Fourth Proportional to 476,858.72, 715,275.12 and 220,656.80

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Solution

The fourth proportional to 476,858.72, 715,275.12 and 220,656.80 is: 330,979.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,858.72 : 715,275.12 = 220,656.80 : x
  2. Step 2: Convert to fraction form
    476,858.72/715,275.12 = 220,656.80/x
  3. Step 3: Cross multiply
    476,858.72x = 715,275.12 × 220,656.80
  4. Step 4: Simplify right side
    476,858.72x = 157,830,319,098.82
  5. Step 5: Solve for x
    x = 157,830,319,098.82/476,858.72
  6. Step 6: Final answer
    x = 330,979.20

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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.