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Finding the Fourth Proportional to 975.50, 1,461.91 and 448.01

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Solution

The fourth proportional to 975.50, 1,461.91 and 448.01 is: 671.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.50 : 1,461.91 = 448.01 : x
  2. Step 2: Convert to fraction form
    975.50/1,461.91 = 448.01/x
  3. Step 3: Cross multiply
    975.50x = 1,461.91 × 448.01
  4. Step 4: Simplify right side
    975.50x = 654,950.30
  5. Step 5: Solve for x
    x = 654,950.30/975.50
  6. Step 6: Final answer
    x = 671.40

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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.