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Finding the Fourth Proportional to 882.04, 1,215.30 and 715.72

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Solution

The fourth proportional to 882.04, 1,215.30 and 715.72 is: 986.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.04 : 1,215.30 = 715.72 : x
  2. Step 2: Convert to fraction form
    882.04/1,215.30 = 715.72/x
  3. Step 3: Cross multiply
    882.04x = 1,215.30 × 715.72
  4. Step 4: Simplify right side
    882.04x = 869,814.52
  5. Step 5: Solve for x
    x = 869,814.52/882.04
  6. Step 6: Final answer
    x = 986.14

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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.