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Finding the Fourth Proportional to 668,659.17, 922,531.71 and 378,242.66

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Solution

The fourth proportional to 668,659.17, 922,531.71 and 378,242.66 is: 521,851.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,659.17 : 922,531.71 = 378,242.66 : x
  2. Step 2: Convert to fraction form
    668,659.17/922,531.71 = 378,242.66/x
  3. Step 3: Cross multiply
    668,659.17x = 922,531.71 × 378,242.66
  4. Step 4: Simplify right side
    668,659.17x = 348,940,843,312.09
  5. Step 5: Solve for x
    x = 348,940,843,312.09/668,659.17
  6. Step 6: Final answer
    x = 521,851.58

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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.