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Finding the Fourth Proportional to 670.01, 1,005.02 and 345.47

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Solution

The fourth proportional to 670.01, 1,005.02 and 345.47 is: 518.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.01 : 1,005.02 = 345.47 : x
  2. Step 2: Convert to fraction form
    670.01/1,005.02 = 345.47/x
  3. Step 3: Cross multiply
    670.01x = 1,005.02 × 345.47
  4. Step 4: Simplify right side
    670.01x = 347,202.53
  5. Step 5: Solve for x
    x = 347,202.53/670.01
  6. Step 6: Final answer
    x = 518.21

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Double scale
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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.