Home / 709,913.58-979,720.45-387,653.60

Finding the Fourth Proportional to 709,913.58, 979,720.45 and 387,653.60

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Solution

The fourth proportional to 709,913.58, 979,720.45 and 387,653.60 is: 534,983.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,913.58 : 979,720.45 = 387,653.60 : x
  2. Step 2: Convert to fraction form
    709,913.58/979,720.45 = 387,653.60/x
  3. Step 3: Cross multiply
    709,913.58x = 979,720.45 × 387,653.60
  4. Step 4: Simplify right side
    709,913.58x = 379,792,159,436.12
  5. Step 5: Solve for x
    x = 379,792,159,436.12/709,913.58
  6. Step 6: Final answer
    x = 534,983.65

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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.