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Finding the Fourth Proportional to 1,047.03, 1,570.64 and 316.47

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Solution

The fourth proportional to 1,047.03, 1,570.64 and 316.47 is: 474.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,047.03 : 1,570.64 = 316.47 : x
  2. Step 2: Convert to fraction form
    1,047.03/1,570.64 = 316.47/x
  3. Step 3: Cross multiply
    1,047.03x = 1,570.64 × 316.47
  4. Step 4: Simplify right side
    1,047.03x = 497,066.53
  5. Step 5: Solve for x
    x = 497,066.53/1,047.03
  6. Step 6: Final answer
    x = 474.74

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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.