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Finding the Fourth Proportional to 665,643.20, 918,586.88 and 363,836.48

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Solution

The fourth proportional to 665,643.20, 918,586.88 and 363,836.48 is: 502,093.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,643.20 : 918,586.88 = 363,836.48 : x
  2. Step 2: Convert to fraction form
    665,643.20/918,586.88 = 363,836.48/x
  3. Step 3: Cross multiply
    665,643.20x = 918,586.88 × 363,836.48
  4. Step 4: Simplify right side
    665,643.20x = 334,215,416,993.38
  5. Step 5: Solve for x
    x = 334,215,416,993.38/665,643.20
  6. Step 6: Final answer
    x = 502,093.94

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1.5x scale

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.