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Finding the Fourth Proportional to 1,078.89, 1,488.85 and 606.77

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Solution

The fourth proportional to 1,078.89, 1,488.85 and 606.77 is: 837.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078.89 : 1,488.85 = 606.77 : x
  2. Step 2: Convert to fraction form
    1,078.89/1,488.85 = 606.77/x
  3. Step 3: Cross multiply
    1,078.89x = 1,488.85 × 606.77
  4. Step 4: Simplify right side
    1,078.89x = 903,386.14
  5. Step 5: Solve for x
    x = 903,386.14/1,078.89
  6. Step 6: Final answer
    x = 837.33

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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.