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Finding the Fourth Proportional to 445.69, 615.08 and 259.18

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Solution

The fourth proportional to 445.69, 615.08 and 259.18 is: 357.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.69 : 615.08 = 259.18 : x
  2. Step 2: Convert to fraction form
    445.69/615.08 = 259.18/x
  3. Step 3: Cross multiply
    445.69x = 615.08 × 259.18
  4. Step 4: Simplify right side
    445.69x = 159,416.43
  5. Step 5: Solve for x
    x = 159,416.43/445.69
  6. Step 6: Final answer
    x = 357.68

Related Problems

Find fourth proportional to 222.85, 307.54 and 129.59
Half scale
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Double scale
Find fourth proportional to 446.69, 616.46 and 260.18
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.