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Finding the Fourth Proportional to 516,007.20, 774,010.80 and 313,928.40

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Solution

The fourth proportional to 516,007.20, 774,010.80 and 313,928.40 is: 470,892.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,007.20 : 774,010.80 = 313,928.40 : x
  2. Step 2: Convert to fraction form
    516,007.20/774,010.80 = 313,928.40/x
  3. Step 3: Cross multiply
    516,007.20x = 774,010.80 × 313,928.40
  4. Step 4: Simplify right side
    516,007.20x = 242,983,972,026.72
  5. Step 5: Solve for x
    x = 242,983,972,026.72/516,007.20
  6. Step 6: Final answer
    x = 470,892.60

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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.