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Finding the Fourth Proportional to 401,404.22, 553,401.93 and 318,891.96

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Solution

The fourth proportional to 401,404.22, 553,401.93 and 318,891.96 is: 439,645.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,404.22 : 553,401.93 = 318,891.96 : x
  2. Step 2: Convert to fraction form
    401,404.22/553,401.93 = 318,891.96/x
  3. Step 3: Cross multiply
    401,404.22x = 553,401.93 × 318,891.96
  4. Step 4: Simplify right side
    401,404.22x = 176,475,426,125.48
  5. Step 5: Solve for x
    x = 176,475,426,125.48/401,404.22
  6. Step 6: Final answer
    x = 439,645.17

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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.