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Finding the Fourth Proportional to 1,130.01, 1,559.64 and 776.89

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Solution

The fourth proportional to 1,130.01, 1,559.64 and 776.89 is: 1,072.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.01 : 1,559.64 = 776.89 : x
  2. Step 2: Convert to fraction form
    1,130.01/1,559.64 = 776.89/x
  3. Step 3: Cross multiply
    1,130.01x = 1,559.64 × 776.89
  4. Step 4: Simplify right side
    1,130.01x = 1,211,668.72
  5. Step 5: Solve for x
    x = 1,211,668.72/1,130.01
  6. Step 6: Final answer
    x = 1,072.26

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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.