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Finding the Fourth Proportional to 708,043.20, 978,342.48 and 565,975.68

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Solution

The fourth proportional to 708,043.20, 978,342.48 and 565,975.68 is: 782,039.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,043.20 : 978,342.48 = 565,975.68 : x
  2. Step 2: Convert to fraction form
    708,043.20/978,342.48 = 565,975.68/x
  3. Step 3: Cross multiply
    708,043.20x = 978,342.48 × 565,975.68
  4. Step 4: Simplify right side
    708,043.20x = 553,718,050,390.89
  5. Step 5: Solve for x
    x = 553,718,050,390.89/708,043.20
  6. Step 6: Final answer
    x = 782,039.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.