Home / 1,646.40-2,272.02-947.76

Finding the Fourth Proportional to 1,646.40, 2,272.02 and 947.76

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Solution

The fourth proportional to 1,646.40, 2,272.02 and 947.76 is: 1,307.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,646.40 : 2,272.02 = 947.76 : x
  2. Step 2: Convert to fraction form
    1,646.40/2,272.02 = 947.76/x
  3. Step 3: Cross multiply
    1,646.40x = 2,272.02 × 947.76
  4. Step 4: Simplify right side
    1,646.40x = 2,153,329.68
  5. Step 5: Solve for x
    x = 2,153,329.68/1,646.40
  6. Step 6: Final answer
    x = 1,307.90

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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.