Home / 1,646.40-2,271.48-947.76

Finding the Fourth Proportional to 1,646.40, 2,271.48 and 947.76

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Solution

The fourth proportional to 1,646.40, 2,271.48 and 947.76 is: 1,307.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,646.40 : 2,271.48 = 947.76 : x
  2. Step 2: Convert to fraction form
    1,646.40/2,271.48 = 947.76/x
  3. Step 3: Cross multiply
    1,646.40x = 2,271.48 × 947.76
  4. Step 4: Simplify right side
    1,646.40x = 2,152,817.88
  5. Step 5: Solve for x
    x = 2,152,817.88/1,646.40
  6. Step 6: Final answer
    x = 1,307.59

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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.