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Finding the Fourth Proportional to 980.19, 1,352.97 and 607.18

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Solution

The fourth proportional to 980.19, 1,352.97 and 607.18 is: 838.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.19 : 1,352.97 = 607.18 : x
  2. Step 2: Convert to fraction form
    980.19/1,352.97 = 607.18/x
  3. Step 3: Cross multiply
    980.19x = 1,352.97 × 607.18
  4. Step 4: Simplify right side
    980.19x = 821,496.32
  5. Step 5: Solve for x
    x = 821,496.32/980.19
  6. Step 6: Final answer
    x = 838.10

Related Problems

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Half scale
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Double scale
Find fourth proportional to 981.19, 1,354.35 and 608.18
Similar ratio
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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.