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Finding the Fourth Proportional to 617.54, 921.12 and 525.20

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Solution

The fourth proportional to 617.54, 921.12 and 525.20 is: 783.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.54 : 921.12 = 525.20 : x
  2. Step 2: Convert to fraction form
    617.54/921.12 = 525.20/x
  3. Step 3: Cross multiply
    617.54x = 921.12 × 525.20
  4. Step 4: Simplify right side
    617.54x = 483,772.22
  5. Step 5: Solve for x
    x = 483,772.22/617.54
  6. Step 6: Final answer
    x = 783.39

Related Problems

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Half scale
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Double scale
Find fourth proportional to 618.54, 922.61 and 526.20
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.