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Finding the Fourth Proportional to 1,430.97, 2,146.28 and 650.15

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Solution

The fourth proportional to 1,430.97, 2,146.28 and 650.15 is: 975.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.97 : 2,146.28 = 650.15 : x
  2. Step 2: Convert to fraction form
    1,430.97/2,146.28 = 650.15/x
  3. Step 3: Cross multiply
    1,430.97x = 2,146.28 × 650.15
  4. Step 4: Simplify right side
    1,430.97x = 1,395,403.94
  5. Step 5: Solve for x
    x = 1,395,403.94/1,430.97
  6. Step 6: Final answer
    x = 975.15

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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.