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Finding the Fourth Proportional to 540.27, 744.80 and 384.75

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Solution

The fourth proportional to 540.27, 744.80 and 384.75 is: 530.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.27 : 744.80 = 384.75 : x
  2. Step 2: Convert to fraction form
    540.27/744.80 = 384.75/x
  3. Step 3: Cross multiply
    540.27x = 744.80 × 384.75
  4. Step 4: Simplify right side
    540.27x = 286,559.88
  5. Step 5: Solve for x
    x = 286,559.88/540.27
  6. Step 6: Final answer
    x = 530.40

Related Problems

Find fourth proportional to 270.14, 372.40 and 192.38
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Double scale
Find fourth proportional to 541.27, 746.17 and 385.75
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.