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Finding the Fourth Proportional to 947.51, 1,421.25 and 560.19

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Solution

The fourth proportional to 947.51, 1,421.25 and 560.19 is: 840.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.51 : 1,421.25 = 560.19 : x
  2. Step 2: Convert to fraction form
    947.51/1,421.25 = 560.19/x
  3. Step 3: Cross multiply
    947.51x = 1,421.25 × 560.19
  4. Step 4: Simplify right side
    947.51x = 796,173.27
  5. Step 5: Solve for x
    x = 796,173.27/947.51
  6. Step 6: Final answer
    x = 840.28

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.