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Finding the Fourth Proportional to 662,361.75, 914,157.63 and 390,342.69

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Solution

The fourth proportional to 662,361.75, 914,157.63 and 390,342.69 is: 538,730.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,361.75 : 914,157.63 = 390,342.69 : x
  2. Step 2: Convert to fraction form
    662,361.75/914,157.63 = 390,342.69/x
  3. Step 3: Cross multiply
    662,361.75x = 914,157.63 × 390,342.69
  4. Step 4: Simplify right side
    662,361.75x = 356,834,748,378.23
  5. Step 5: Solve for x
    x = 356,834,748,378.23/662,361.75
  6. Step 6: Final answer
    x = 538,730.91

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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.