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Finding the Fourth Proportional to 2,946.40, 4,412.40 and 2,816.80

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Solution

The fourth proportional to 2,946.40, 4,412.40 and 2,816.80 is: 4,218.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,946.40 : 4,412.40 = 2,816.80 : x
  2. Step 2: Convert to fraction form
    2,946.40/4,412.40 = 2,816.80/x
  3. Step 3: Cross multiply
    2,946.40x = 4,412.40 × 2,816.80
  4. Step 4: Simplify right side
    2,946.40x = 12,428,848.32
  5. Step 5: Solve for x
    x = 12,428,848.32/2,946.40
  6. Step 6: Final answer
    x = 4,218.32

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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.