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Finding the Fourth Proportional to 410,220.80, 614,985.60 and 213,228.80

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Solution

The fourth proportional to 410,220.80, 614,985.60 and 213,228.80 is: 319,663.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,220.80 : 614,985.60 = 213,228.80 : x
  2. Step 2: Convert to fraction form
    410,220.80/614,985.60 = 213,228.80/x
  3. Step 3: Cross multiply
    410,220.80x = 614,985.60 × 213,228.80
  4. Step 4: Simplify right side
    410,220.80x = 131,132,641,505.28
  5. Step 5: Solve for x
    x = 131,132,641,505.28/410,220.80
  6. Step 6: Final answer
    x = 319,663.56

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1.5x scale

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.