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Finding the Fourth Proportional to 478,781.96, 660,714.63 and 260,990.60

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Solution

The fourth proportional to 478,781.96, 660,714.63 and 260,990.60 is: 360,164.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,781.96 : 660,714.63 = 260,990.60 : x
  2. Step 2: Convert to fraction form
    478,781.96/660,714.63 = 260,990.60/x
  3. Step 3: Cross multiply
    478,781.96x = 660,714.63 × 260,990.60
  4. Step 4: Simplify right side
    478,781.96x = 172,440,307,712.48
  5. Step 5: Solve for x
    x = 172,440,307,712.48/478,781.96
  6. Step 6: Final answer
    x = 360,164.59

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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.