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Finding the Fourth Proportional to 578.75, 798.72 and 345.92

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Solution

The fourth proportional to 578.75, 798.72 and 345.92 is: 477.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.75 : 798.72 = 345.92 : x
  2. Step 2: Convert to fraction form
    578.75/798.72 = 345.92/x
  3. Step 3: Cross multiply
    578.75x = 798.72 × 345.92
  4. Step 4: Simplify right side
    578.75x = 276,293.22
  5. Step 5: Solve for x
    x = 276,293.22/578.75
  6. Step 6: Final answer
    x = 477.40

Related Problems

Find fourth proportional to 289.38, 399.36 and 172.96
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Double scale
Find fourth proportional to 579.75, 800.10 and 346.92
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.