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Finding the Fourth Proportional to 661,488.48, 912,835.44 and 406,798.56

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Solution

The fourth proportional to 661,488.48, 912,835.44 and 406,798.56 is: 561,370.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,488.48 : 912,835.44 = 406,798.56 : x
  2. Step 2: Convert to fraction form
    661,488.48/912,835.44 = 406,798.56/x
  3. Step 3: Cross multiply
    661,488.48x = 912,835.44 × 406,798.56
  4. Step 4: Simplify right side
    661,488.48x = 371,340,142,508.97
  5. Step 5: Solve for x
    x = 371,340,142,508.97/661,488.48
  6. Step 6: Final answer
    x = 561,370.54

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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.