Home / 709,976.30-979,807.12-387,716.36

Finding the Fourth Proportional to 709,976.30, 979,807.12 and 387,716.36

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Solution

The fourth proportional to 709,976.30, 979,807.12 and 387,716.36 is: 535,070.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,976.30 : 979,807.12 = 387,716.36 : x
  2. Step 2: Convert to fraction form
    709,976.30/979,807.12 = 387,716.36/x
  3. Step 3: Cross multiply
    709,976.30x = 979,807.12 × 387,716.36
  4. Step 4: Simplify right side
    709,976.30x = 379,887,250,068.48
  5. Step 5: Solve for x
    x = 379,887,250,068.48/709,976.30
  6. Step 6: Final answer
    x = 535,070.33

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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.