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Finding the Fourth Proportional to 259,386.70, 389,116.47 and 90,868.45

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Solution

The fourth proportional to 259,386.70, 389,116.47 and 90,868.45 is: 136,315.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,386.70 : 389,116.47 = 90,868.45 : x
  2. Step 2: Convert to fraction form
    259,386.70/389,116.47 = 90,868.45/x
  3. Step 3: Cross multiply
    259,386.70x = 389,116.47 × 90,868.45
  4. Step 4: Simplify right side
    259,386.70x = 35,358,410,498.37
  5. Step 5: Solve for x
    x = 35,358,410,498.37/259,386.70
  6. Step 6: Final answer
    x = 136,315.43

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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.