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Finding the Fourth Proportional to 917.80, 1,266.18 and 606.76

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Solution

The fourth proportional to 917.80, 1,266.18 and 606.76 is: 837.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.80 : 1,266.18 = 606.76 : x
  2. Step 2: Convert to fraction form
    917.80/1,266.18 = 606.76/x
  3. Step 3: Cross multiply
    917.80x = 1,266.18 × 606.76
  4. Step 4: Simplify right side
    917.80x = 768,267.38
  5. Step 5: Solve for x
    x = 768,267.38/917.80
  6. Step 6: Final answer
    x = 837.07

Related Problems

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Half scale
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Double scale
Find fourth proportional to 918.80, 1,267.56 and 607.76
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.