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Finding the Fourth Proportional to 1,509.92, 2,265.12 and 859.32

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Solution

The fourth proportional to 1,509.92, 2,265.12 and 859.32 is: 1,289.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,509.92 : 2,265.12 = 859.32 : x
  2. Step 2: Convert to fraction form
    1,509.92/2,265.12 = 859.32/x
  3. Step 3: Cross multiply
    1,509.92x = 2,265.12 × 859.32
  4. Step 4: Simplify right side
    1,509.92x = 1,946,462.92
  5. Step 5: Solve for x
    x = 1,946,462.92/1,509.92
  6. Step 6: Final answer
    x = 1,289.12

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1.5x scale

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.