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Finding the Fourth Proportional to 1,707.78, 2,561.70 and 976.98

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Solution

The fourth proportional to 1,707.78, 2,561.70 and 976.98 is: 1,465.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,707.78 : 2,561.70 = 976.98 : x
  2. Step 2: Convert to fraction form
    1,707.78/2,561.70 = 976.98/x
  3. Step 3: Cross multiply
    1,707.78x = 2,561.70 × 976.98
  4. Step 4: Simplify right side
    1,707.78x = 2,502,729.67
  5. Step 5: Solve for x
    x = 2,502,729.67/1,707.78
  6. Step 6: Final answer
    x = 1,465.49

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.