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Finding the Fourth Proportional to 636,870.64, 954,518.64 and 321,417.76

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Solution

The fourth proportional to 636,870.64, 954,518.64 and 321,417.76 is: 481,729.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,870.64 : 954,518.64 = 321,417.76 : x
  2. Step 2: Convert to fraction form
    636,870.64/954,518.64 = 321,417.76/x
  3. Step 3: Cross multiply
    636,870.64x = 954,518.64 × 321,417.76
  4. Step 4: Simplify right side
    636,870.64x = 306,799,243,147.05
  5. Step 5: Solve for x
    x = 306,799,243,147.05/636,870.64
  6. Step 6: Final answer
    x = 481,729.29

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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.