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Finding the Fourth Proportional to 572.76, 789.08 and 474.21

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Solution

The fourth proportional to 572.76, 789.08 and 474.21 is: 653.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.76 : 789.08 = 474.21 : x
  2. Step 2: Convert to fraction form
    572.76/789.08 = 474.21/x
  3. Step 3: Cross multiply
    572.76x = 789.08 × 474.21
  4. Step 4: Simplify right side
    572.76x = 374,187.26
  5. Step 5: Solve for x
    x = 374,187.26/572.76
  6. Step 6: Final answer
    x = 653.31

Related Problems

Find fourth proportional to 286.38, 394.54 and 237.11
Half scale
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Double scale
Find fourth proportional to 573.76, 790.45 and 475.21
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.