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Finding the Fourth Proportional to 985.10, 1,477.56 and 498.48

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Solution

The fourth proportional to 985.10, 1,477.56 and 498.48 is: 747.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.10 : 1,477.56 = 498.48 : x
  2. Step 2: Convert to fraction form
    985.10/1,477.56 = 498.48/x
  3. Step 3: Cross multiply
    985.10x = 1,477.56 × 498.48
  4. Step 4: Simplify right side
    985.10x = 736,534.11
  5. Step 5: Solve for x
    x = 736,534.11/985.10
  6. Step 6: Final answer
    x = 747.67

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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.