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Finding the Fourth Proportional to 722,419.84, 996,928.40 and 395,730.24

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Solution

The fourth proportional to 722,419.84, 996,928.40 and 395,730.24 is: 546,101.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,419.84 : 996,928.40 = 395,730.24 : x
  2. Step 2: Convert to fraction form
    722,419.84/996,928.40 = 395,730.24/x
  3. Step 3: Cross multiply
    722,419.84x = 996,928.40 × 395,730.24
  4. Step 4: Simplify right side
    722,419.84x = 394,514,714,994.82
  5. Step 5: Solve for x
    x = 394,514,714,994.82/722,419.84
  6. Step 6: Final answer
    x = 546,101.72

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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.