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Finding the Fourth Proportional to 1,580.23, 2,370.75 and 655.55

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Solution

The fourth proportional to 1,580.23, 2,370.75 and 655.55 is: 983.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.23 : 2,370.75 = 655.55 : x
  2. Step 2: Convert to fraction form
    1,580.23/2,370.75 = 655.55/x
  3. Step 3: Cross multiply
    1,580.23x = 2,370.75 × 655.55
  4. Step 4: Simplify right side
    1,580.23x = 1,554,145.16
  5. Step 5: Solve for x
    x = 1,554,145.16/1,580.23
  6. Step 6: Final answer
    x = 983.49

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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.