Home / 1,570.04-2,166.72-871.40

Finding the Fourth Proportional to 1,570.04, 2,166.72 and 871.40

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Solution

The fourth proportional to 1,570.04, 2,166.72 and 871.40 is: 1,202.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,570.04 : 2,166.72 = 871.40 : x
  2. Step 2: Convert to fraction form
    1,570.04/2,166.72 = 871.40/x
  3. Step 3: Cross multiply
    1,570.04x = 2,166.72 × 871.40
  4. Step 4: Simplify right side
    1,570.04x = 1,888,079.81
  5. Step 5: Solve for x
    x = 1,888,079.81/1,570.04
  6. Step 6: Final answer
    x = 1,202.57

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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.