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Finding the Fourth Proportional to 611,566.90, 917,350.35 and 331,630.90

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Solution

The fourth proportional to 611,566.90, 917,350.35 and 331,630.90 is: 497,446.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,566.90 : 917,350.35 = 331,630.90 : x
  2. Step 2: Convert to fraction form
    611,566.90/917,350.35 = 331,630.90/x
  3. Step 3: Cross multiply
    611,566.90x = 917,350.35 × 331,630.90
  4. Step 4: Simplify right side
    611,566.90x = 304,221,722,185.82
  5. Step 5: Solve for x
    x = 304,221,722,185.82/611,566.90
  6. Step 6: Final answer
    x = 497,446.35

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Double scale
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Similar ratio
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1.5x scale

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.