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Finding the Fourth Proportional to 1,570.35, 2,166.85 and 940.76

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Solution

The fourth proportional to 1,570.35, 2,166.85 and 940.76 is: 1,298.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,570.35 : 2,166.85 = 940.76 : x
  2. Step 2: Convert to fraction form
    1,570.35/2,166.85 = 940.76/x
  3. Step 3: Cross multiply
    1,570.35x = 2,166.85 × 940.76
  4. Step 4: Simplify right side
    1,570.35x = 2,038,496.46
  5. Step 5: Solve for x
    x = 2,038,496.46/1,570.35
  6. Step 6: Final answer
    x = 1,298.11

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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.