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Finding the Fourth Proportional to 661,021.17, 912,488.30 and 446,451.87

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Solution

The fourth proportional to 661,021.17, 912,488.30 and 446,451.87 is: 616,292.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,021.17 : 912,488.30 = 446,451.87 : x
  2. Step 2: Convert to fraction form
    661,021.17/912,488.30 = 446,451.87/x
  3. Step 3: Cross multiply
    661,021.17x = 912,488.30 × 446,451.87
  4. Step 4: Simplify right side
    661,021.17x = 407,382,107,888.12
  5. Step 5: Solve for x
    x = 407,382,107,888.12/661,021.17
  6. Step 6: Final answer
    x = 616,292.07

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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.