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Finding the Fourth Proportional to 1,155.64, 1,595.60 and 714.12

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Solution

The fourth proportional to 1,155.64, 1,595.60 and 714.12 is: 985.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.64 : 1,595.60 = 714.12 : x
  2. Step 2: Convert to fraction form
    1,155.64/1,595.60 = 714.12/x
  3. Step 3: Cross multiply
    1,155.64x = 1,595.60 × 714.12
  4. Step 4: Simplify right side
    1,155.64x = 1,139,449.87
  5. Step 5: Solve for x
    x = 1,139,449.87/1,155.64
  6. Step 6: Final answer
    x = 985.99

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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.