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Finding the Fourth Proportional to 1,047.04, 1,570.62 and 397.76

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Solution

The fourth proportional to 1,047.04, 1,570.62 and 397.76 is: 596.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,047.04 : 1,570.62 = 397.76 : x
  2. Step 2: Convert to fraction form
    1,047.04/1,570.62 = 397.76/x
  3. Step 3: Cross multiply
    1,047.04x = 1,570.62 × 397.76
  4. Step 4: Simplify right side
    1,047.04x = 624,729.81
  5. Step 5: Solve for x
    x = 624,729.81/1,047.04
  6. Step 6: Final answer
    x = 596.66

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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.