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Finding the Fourth Proportional to 709,400.64, 978,986.88 and 556,621.92

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Solution

The fourth proportional to 709,400.64, 978,986.88 and 556,621.92 is: 768,149.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,400.64 : 978,986.88 = 556,621.92 : x
  2. Step 2: Convert to fraction form
    709,400.64/978,986.88 = 556,621.92/x
  3. Step 3: Cross multiply
    709,400.64x = 978,986.88 × 556,621.92
  4. Step 4: Simplify right side
    709,400.64x = 544,925,556,800.41
  5. Step 5: Solve for x
    x = 544,925,556,800.41/709,400.64
  6. Step 6: Final answer
    x = 768,149.23

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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.