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Finding the Fourth Proportional to 553,994.24, 764,501.29 and 312,272.21

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Solution

The fourth proportional to 553,994.24, 764,501.29 and 312,272.21 is: 430,929.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,994.24 : 764,501.29 = 312,272.21 : x
  2. Step 2: Convert to fraction form
    553,994.24/764,501.29 = 312,272.21/x
  3. Step 3: Cross multiply
    553,994.24x = 764,501.29 × 312,272.21
  4. Step 4: Simplify right side
    553,994.24x = 238,732,508,506.72
  5. Step 5: Solve for x
    x = 238,732,508,506.72/553,994.24
  6. Step 6: Final answer
    x = 430,929.59

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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.