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Finding the Fourth Proportional to 664,266.22, 916,458.87 and 402,705.88

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Solution

The fourth proportional to 664,266.22, 916,458.87 and 402,705.88 is: 555,595.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,266.22 : 916,458.87 = 402,705.88 : x
  2. Step 2: Convert to fraction form
    664,266.22/916,458.87 = 402,705.88/x
  3. Step 3: Cross multiply
    664,266.22x = 916,458.87 × 402,705.88
  4. Step 4: Simplify right side
    664,266.22x = 369,063,375,727.16
  5. Step 5: Solve for x
    x = 369,063,375,727.16/664,266.22
  6. Step 6: Final answer
    x = 555,595.58

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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.