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Finding the Fourth Proportional to 665,672.40, 998,508.60 and 553,479.30

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Solution

The fourth proportional to 665,672.40, 998,508.60 and 553,479.30 is: 830,218.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,672.40 : 998,508.60 = 553,479.30 : x
  2. Step 2: Convert to fraction form
    665,672.40/998,508.60 = 553,479.30/x
  3. Step 3: Cross multiply
    665,672.40x = 998,508.60 × 553,479.30
  4. Step 4: Simplify right side
    665,672.40x = 552,653,840,971.98
  5. Step 5: Solve for x
    x = 552,653,840,971.98/665,672.40
  6. Step 6: Final answer
    x = 830,218.95

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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.