Home / 1,317.60-1,816.29-945.36

Finding the Fourth Proportional to 1,317.60, 1,816.29 and 945.36

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Solution

The fourth proportional to 1,317.60, 1,816.29 and 945.36 is: 1,303.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.60 : 1,816.29 = 945.36 : x
  2. Step 2: Convert to fraction form
    1,317.60/1,816.29 = 945.36/x
  3. Step 3: Cross multiply
    1,317.60x = 1,816.29 × 945.36
  4. Step 4: Simplify right side
    1,317.60x = 1,717,047.91
  5. Step 5: Solve for x
    x = 1,717,047.91/1,317.60
  6. Step 6: Final answer
    x = 1,303.16

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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.