Home / 1,316.08-1,816.20-1,021.74

Finding the Fourth Proportional to 1,316.08, 1,816.20 and 1,021.74

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Solution

The fourth proportional to 1,316.08, 1,816.20 and 1,021.74 is: 1,410.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.08 : 1,816.20 = 1,021.74 : x
  2. Step 2: Convert to fraction form
    1,316.08/1,816.20 = 1,021.74/x
  3. Step 3: Cross multiply
    1,316.08x = 1,816.20 × 1,021.74
  4. Step 4: Simplify right side
    1,316.08x = 1,855,684.19
  5. Step 5: Solve for x
    x = 1,855,684.19/1,316.08
  6. Step 6: Final answer
    x = 1,410.01

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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.