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Finding the Fourth Proportional to 654,221.80, 980,166.30 and 553,911.40

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Solution

The fourth proportional to 654,221.80, 980,166.30 and 553,911.40 is: 829,879.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,221.80 : 980,166.30 = 553,911.40 : x
  2. Step 2: Convert to fraction form
    654,221.80/980,166.30 = 553,911.40/x
  3. Step 3: Cross multiply
    654,221.80x = 980,166.30 × 553,911.40
  4. Step 4: Simplify right side
    654,221.80x = 542,925,287,465.82
  5. Step 5: Solve for x
    x = 542,925,287,465.82/654,221.80
  6. Step 6: Final answer
    x = 829,879.54

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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.