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Finding the Fourth Proportional to 1,098.32, 1,515.64 and 632.72

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Solution

The fourth proportional to 1,098.32, 1,515.64 and 632.72 is: 873.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.32 : 1,515.64 = 632.72 : x
  2. Step 2: Convert to fraction form
    1,098.32/1,515.64 = 632.72/x
  3. Step 3: Cross multiply
    1,098.32x = 1,515.64 × 632.72
  4. Step 4: Simplify right side
    1,098.32x = 958,975.74
  5. Step 5: Solve for x
    x = 958,975.74/1,098.32
  6. Step 6: Final answer
    x = 873.13

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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.