Home / 709,918.16-979,682.15-387,628.07

Finding the Fourth Proportional to 709,918.16, 979,682.15 and 387,628.07

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Solution

The fourth proportional to 709,918.16, 979,682.15 and 387,628.07 is: 534,924.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,918.16 : 979,682.15 = 387,628.07 : x
  2. Step 2: Convert to fraction form
    709,918.16/979,682.15 = 387,628.07/x
  3. Step 3: Cross multiply
    709,918.16x = 979,682.15 × 387,628.07
  4. Step 4: Simplify right side
    709,918.16x = 379,752,299,079.81
  5. Step 5: Solve for x
    x = 379,752,299,079.81/709,918.16
  6. Step 6: Final answer
    x = 534,924.05

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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.