Home / 651,109.20-976,663.80-399,166.80

Finding the Fourth Proportional to 651,109.20, 976,663.80 and 399,166.80

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Solution

The fourth proportional to 651,109.20, 976,663.80 and 399,166.80 is: 598,750.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,109.20 : 976,663.80 = 399,166.80 : x
  2. Step 2: Convert to fraction form
    651,109.20/976,663.80 = 399,166.80/x
  3. Step 3: Cross multiply
    651,109.20x = 976,663.80 × 399,166.80
  4. Step 4: Simplify right side
    651,109.20x = 389,851,763,721.84
  5. Step 5: Solve for x
    x = 389,851,763,721.84/651,109.20
  6. Step 6: Final answer
    x = 598,750.20

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Double scale
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Similar ratio
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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.