Home / 686,210.70-1,029,356.37-265,488.78

Finding the Fourth Proportional to 686,210.70, 1,029,356.37 and 265,488.78

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Solution

The fourth proportional to 686,210.70, 1,029,356.37 and 265,488.78 is: 398,248.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,210.70 : 1,029,356.37 = 265,488.78 : x
  2. Step 2: Convert to fraction form
    686,210.70/1,029,356.37 = 265,488.78/x
  3. Step 3: Cross multiply
    686,210.70x = 1,029,356.37 × 265,488.78
  4. Step 4: Simplify right side
    686,210.70x = 273,282,566,856.53
  5. Step 5: Solve for x
    x = 273,282,566,856.53/686,210.70
  6. Step 6: Final answer
    x = 398,248.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.