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Finding the Fourth Proportional to 487,518.12, 731,368.68 and 221,297.32

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Solution

The fourth proportional to 487,518.12, 731,368.68 and 221,297.32 is: 331,987.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,518.12 : 731,368.68 = 221,297.32 : x
  2. Step 2: Convert to fraction form
    487,518.12/731,368.68 = 221,297.32/x
  3. Step 3: Cross multiply
    487,518.12x = 731,368.68 × 221,297.32
  4. Step 4: Simplify right side
    487,518.12x = 161,849,928,815.94
  5. Step 5: Solve for x
    x = 161,849,928,815.94/487,518.12
  6. Step 6: Final answer
    x = 331,987.51

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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.