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Finding the Fourth Proportional to 664,782.40, 996,007.20 and 545,809.60

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Solution

The fourth proportional to 664,782.40, 996,007.20 and 545,809.60 is: 817,756.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,782.40 : 996,007.20 = 545,809.60 : x
  2. Step 2: Convert to fraction form
    664,782.40/996,007.20 = 545,809.60/x
  3. Step 3: Cross multiply
    664,782.40x = 996,007.20 × 545,809.60
  4. Step 4: Simplify right side
    664,782.40x = 543,630,291,429.12
  5. Step 5: Solve for x
    x = 543,630,291,429.12/664,782.40
  6. Step 6: Final answer
    x = 817,756.74

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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.