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Finding the Fourth Proportional to 618.77, 853.80 and 370.19

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Solution

The fourth proportional to 618.77, 853.80 and 370.19 is: 510.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.77 : 853.80 = 370.19 : x
  2. Step 2: Convert to fraction form
    618.77/853.80 = 370.19/x
  3. Step 3: Cross multiply
    618.77x = 853.80 × 370.19
  4. Step 4: Simplify right side
    618.77x = 316,068.22
  5. Step 5: Solve for x
    x = 316,068.22/618.77
  6. Step 6: Final answer
    x = 510.80

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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.