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Finding the Fourth Proportional to 802.92, 1,108.74 and 618.24

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Solution

The fourth proportional to 802.92, 1,108.74 and 618.24 is: 853.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.92 : 1,108.74 = 618.24 : x
  2. Step 2: Convert to fraction form
    802.92/1,108.74 = 618.24/x
  3. Step 3: Cross multiply
    802.92x = 1,108.74 × 618.24
  4. Step 4: Simplify right side
    802.92x = 685,467.42
  5. Step 5: Solve for x
    x = 685,467.42/802.92
  6. Step 6: Final answer
    x = 853.72

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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.