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Finding the Fourth Proportional to 615.17, 848.90 and 353.19

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Solution

The fourth proportional to 615.17, 848.90 and 353.19 is: 487.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.17 : 848.90 = 353.19 : x
  2. Step 2: Convert to fraction form
    615.17/848.90 = 353.19/x
  3. Step 3: Cross multiply
    615.17x = 848.90 × 353.19
  4. Step 4: Simplify right side
    615.17x = 299,821.23
  5. Step 5: Solve for x
    x = 299,821.23/615.17
  6. Step 6: Final answer
    x = 487.38

Related Problems

Find fourth proportional to 307.58, 424.45 and 176.60
Half scale
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Double scale
Find fourth proportional to 616.17, 850.27 and 354.19
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.