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Finding the Fourth Proportional to 648,003.20, 972,004.80 and 579,768.80

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Solution

The fourth proportional to 648,003.20, 972,004.80 and 579,768.80 is: 869,653.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,003.20 : 972,004.80 = 579,768.80 : x
  2. Step 2: Convert to fraction form
    648,003.20/972,004.80 = 579,768.80/x
  3. Step 3: Cross multiply
    648,003.20x = 972,004.80 × 579,768.80
  4. Step 4: Simplify right side
    648,003.20x = 563,538,056,490.24
  5. Step 5: Solve for x
    x = 563,538,056,490.24/648,003.20
  6. Step 6: Final answer
    x = 869,653.20

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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.