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Finding the Fourth Proportional to 648,019.20, 972,028.80 and 459,062.40

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Solution

The fourth proportional to 648,019.20, 972,028.80 and 459,062.40 is: 688,593.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,019.20 : 972,028.80 = 459,062.40 : x
  2. Step 2: Convert to fraction form
    648,019.20/972,028.80 = 459,062.40/x
  3. Step 3: Cross multiply
    648,019.20x = 972,028.80 × 459,062.40
  4. Step 4: Simplify right side
    648,019.20x = 446,221,873,797.12
  5. Step 5: Solve for x
    x = 446,221,873,797.12/648,019.20
  6. Step 6: Final answer
    x = 688,593.60

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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.