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Finding the Fourth Proportional to 493,585.20, 689,619.60 and 493,585.20

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Solution

The fourth proportional to 493,585.20, 689,619.60 and 493,585.20 is: 689,619.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,585.20 : 689,619.60 = 493,585.20 : x
  2. Step 2: Convert to fraction form
    493,585.20/689,619.60 = 493,585.20/x
  3. Step 3: Cross multiply
    493,585.20x = 689,619.60 × 493,585.20
  4. Step 4: Simplify right side
    493,585.20x = 340,386,028,189.92
  5. Step 5: Solve for x
    x = 340,386,028,189.92/493,585.20
  6. Step 6: Final answer
    x = 689,619.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.