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Finding the Fourth Proportional to 515,602.60, 773,440.74 and 215,781.28

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Solution

The fourth proportional to 515,602.60, 773,440.74 and 215,781.28 is: 323,687.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,602.60 : 773,440.74 = 215,781.28 : x
  2. Step 2: Convert to fraction form
    515,602.60/773,440.74 = 215,781.28/x
  3. Step 3: Cross multiply
    515,602.60x = 773,440.74 × 215,781.28
  4. Step 4: Simplify right side
    515,602.60x = 166,894,032,881.35
  5. Step 5: Solve for x
    x = 166,894,032,881.35/515,602.60
  6. Step 6: Final answer
    x = 323,687.34

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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.