Home / 918,905.74-1,378,358.97-287,868.58

Finding the Fourth Proportional to 918,905.74, 1,378,358.97 and 287,868.58

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Solution

The fourth proportional to 918,905.74, 1,378,358.97 and 287,868.58 is: 431,802.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,905.74 : 1,378,358.97 = 287,868.58 : x
  2. Step 2: Convert to fraction form
    918,905.74/1,378,358.97 = 287,868.58/x
  3. Step 3: Cross multiply
    918,905.74x = 1,378,358.97 × 287,868.58
  4. Step 4: Simplify right side
    918,905.74x = 396,786,239,424.16
  5. Step 5: Solve for x
    x = 396,786,239,424.16/918,905.74
  6. Step 6: Final answer
    x = 431,802.98

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1.5x scale

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.