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Finding the Fourth Proportional to 357,317.01, 493,328.21 and 221,495.40

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Solution

The fourth proportional to 357,317.01, 493,328.21 and 221,495.40 is: 305,806.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,317.01 : 493,328.21 = 221,495.40 : x
  2. Step 2: Convert to fraction form
    357,317.01/493,328.21 = 221,495.40/x
  3. Step 3: Cross multiply
    357,317.01x = 493,328.21 × 221,495.40
  4. Step 4: Simplify right side
    357,317.01x = 109,269,928,097.76
  5. Step 5: Solve for x
    x = 109,269,928,097.76/357,317.01
  6. Step 6: Final answer
    x = 305,806.68

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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.