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Finding the Fourth Proportional to 941.56, 1,412.40 and 478.81

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Solution

The fourth proportional to 941.56, 1,412.40 and 478.81 is: 718.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.56 : 1,412.40 = 478.81 : x
  2. Step 2: Convert to fraction form
    941.56/1,412.40 = 478.81/x
  3. Step 3: Cross multiply
    941.56x = 1,412.40 × 478.81
  4. Step 4: Simplify right side
    941.56x = 676,271.24
  5. Step 5: Solve for x
    x = 676,271.24/941.56
  6. Step 6: Final answer
    x = 718.25

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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.