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Finding the Fourth Proportional to 665,298.94, 918,112.88 and 359,375.31

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Solution

The fourth proportional to 665,298.94, 918,112.88 and 359,375.31 is: 495,938.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,298.94 : 918,112.88 = 359,375.31 : x
  2. Step 2: Convert to fraction form
    665,298.94/918,112.88 = 359,375.31/x
  3. Step 3: Cross multiply
    665,298.94x = 918,112.88 × 359,375.31
  4. Step 4: Simplify right side
    665,298.94x = 329,947,097,159.75
  5. Step 5: Solve for x
    x = 329,947,097,159.75/665,298.94
  6. Step 6: Final answer
    x = 495,938.11

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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.