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Finding the Fourth Proportional to 620,488.17, 930,502.40 and 221,022.81

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Solution

The fourth proportional to 620,488.17, 930,502.40 and 221,022.81 is: 331,452.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,488.17 : 930,502.40 = 221,022.81 : x
  2. Step 2: Convert to fraction form
    620,488.17/930,502.40 = 221,022.81/x
  3. Step 3: Cross multiply
    620,488.17x = 930,502.40 × 221,022.81
  4. Step 4: Simplify right side
    620,488.17x = 205,662,254,054.63
  5. Step 5: Solve for x
    x = 205,662,254,054.63/620,488.17
  6. Step 6: Final answer
    x = 331,452.34

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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.