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Finding the Fourth Proportional to 654.77, 903.41 and 389.19

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Solution

The fourth proportional to 654.77, 903.41 and 389.19 is: 536.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.77 : 903.41 = 389.19 : x
  2. Step 2: Convert to fraction form
    654.77/903.41 = 389.19/x
  3. Step 3: Cross multiply
    654.77x = 903.41 × 389.19
  4. Step 4: Simplify right side
    654.77x = 351,596.19
  5. Step 5: Solve for x
    x = 351,596.19/654.77
  6. Step 6: Final answer
    x = 536.98

Related Problems

Find fourth proportional to 327.38, 451.70 and 194.60
Half scale
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Double scale
Find fourth proportional to 655.77, 904.78 and 390.19
Similar ratio
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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.