Home / 648,128.80-972,193.20-490,664.80

Finding the Fourth Proportional to 648,128.80, 972,193.20 and 490,664.80

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Solution

The fourth proportional to 648,128.80, 972,193.20 and 490,664.80 is: 735,997.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,128.80 : 972,193.20 = 490,664.80 : x
  2. Step 2: Convert to fraction form
    648,128.80/972,193.20 = 490,664.80/x
  3. Step 3: Cross multiply
    648,128.80x = 972,193.20 × 490,664.80
  4. Step 4: Simplify right side
    648,128.80x = 477,020,982,039.36
  5. Step 5: Solve for x
    x = 477,020,982,039.36/648,128.80
  6. Step 6: Final answer
    x = 735,997.20

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Half scale
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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.