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Finding the Fourth Proportional to 709,562.88, 979,208.64 and 407,825.28

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Solution

The fourth proportional to 709,562.88, 979,208.64 and 407,825.28 is: 562,805.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,562.88 : 979,208.64 = 407,825.28 : x
  2. Step 2: Convert to fraction form
    709,562.88/979,208.64 = 407,825.28/x
  3. Step 3: Cross multiply
    709,562.88x = 979,208.64 × 407,825.28
  4. Step 4: Simplify right side
    709,562.88x = 399,346,037,786.42
  5. Step 5: Solve for x
    x = 399,346,037,786.42/709,562.88
  6. Step 6: Final answer
    x = 562,805.71

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1.5x scale

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.