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Finding the Fourth Proportional to 666,208.32, 919,381.20 and 364,421.76

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Solution

The fourth proportional to 666,208.32, 919,381.20 and 364,421.76 is: 502,909.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,208.32 : 919,381.20 = 364,421.76 : x
  2. Step 2: Convert to fraction form
    666,208.32/919,381.20 = 364,421.76/x
  3. Step 3: Cross multiply
    666,208.32x = 919,381.20 × 364,421.76
  4. Step 4: Simplify right side
    666,208.32x = 335,042,515,014.91
  5. Step 5: Solve for x
    x = 335,042,515,014.91/666,208.32
  6. Step 6: Final answer
    x = 502,909.53

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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.