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Finding the Fourth Proportional to 606,643.20, 909,964.80 and 538,408.80

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Solution

The fourth proportional to 606,643.20, 909,964.80 and 538,408.80 is: 807,613.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,643.20 : 909,964.80 = 538,408.80 : x
  2. Step 2: Convert to fraction form
    606,643.20/909,964.80 = 538,408.80/x
  3. Step 3: Cross multiply
    606,643.20x = 909,964.80 × 538,408.80
  4. Step 4: Simplify right side
    606,643.20x = 489,933,056,010.24
  5. Step 5: Solve for x
    x = 489,933,056,010.24/606,643.20
  6. Step 6: Final answer
    x = 807,613.20

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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.