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Finding the Fourth Proportional to 426,398.46, 639,931.92 and 297,476.34

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Solution

The fourth proportional to 426,398.46, 639,931.92 and 297,476.34 is: 446,447.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,398.46 : 639,931.92 = 297,476.34 : x
  2. Step 2: Convert to fraction form
    426,398.46/639,931.92 = 297,476.34/x
  3. Step 3: Cross multiply
    426,398.46x = 639,931.92 × 297,476.34
  4. Step 4: Simplify right side
    426,398.46x = 190,364,605,410.77
  5. Step 5: Solve for x
    x = 190,364,605,410.77/426,398.46
  6. Step 6: Final answer
    x = 446,447.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.