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Finding the Fourth Proportional to 1,060.51, 1,590.74 and 320.10

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Solution

The fourth proportional to 1,060.51, 1,590.74 and 320.10 is: 480.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,060.51 : 1,590.74 = 320.10 : x
  2. Step 2: Convert to fraction form
    1,060.51/1,590.74 = 320.10/x
  3. Step 3: Cross multiply
    1,060.51x = 1,590.74 × 320.10
  4. Step 4: Simplify right side
    1,060.51x = 509,198.46
  5. Step 5: Solve for x
    x = 509,198.46/1,060.51
  6. Step 6: Final answer
    x = 480.15

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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.