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Finding the Fourth Proportional to 1,148.40, 1,585.05 and 706.68

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Solution

The fourth proportional to 1,148.40, 1,585.05 and 706.68 is: 975.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148.40 : 1,585.05 = 706.68 : x
  2. Step 2: Convert to fraction form
    1,148.40/1,585.05 = 706.68/x
  3. Step 3: Cross multiply
    1,148.40x = 1,585.05 × 706.68
  4. Step 4: Simplify right side
    1,148.40x = 1,120,123.13
  5. Step 5: Solve for x
    x = 1,120,123.13/1,148.40
  6. Step 6: Final answer
    x = 975.38

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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.