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Finding the Fourth Proportional to 510.89, 766.35 and 145.67

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Solution

The fourth proportional to 510.89, 766.35 and 145.67 is: 218.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.89 : 766.35 = 145.67 : x
  2. Step 2: Convert to fraction form
    510.89/766.35 = 145.67/x
  3. Step 3: Cross multiply
    510.89x = 766.35 × 145.67
  4. Step 4: Simplify right side
    510.89x = 111,630.37
  5. Step 5: Solve for x
    x = 111,630.37/510.89
  6. Step 6: Final answer
    x = 218.50

Related Problems

Find fourth proportional to 255.44, 383.18 and 72.83
Half scale
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Double scale
Find fourth proportional to 511.89, 767.85 and 146.67
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.