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Finding the Fourth Proportional to 608.76, 840.58 and 578.18

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Solution

The fourth proportional to 608.76, 840.58 and 578.18 is: 798.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.76 : 840.58 = 578.18 : x
  2. Step 2: Convert to fraction form
    608.76/840.58 = 578.18/x
  3. Step 3: Cross multiply
    608.76x = 840.58 × 578.18
  4. Step 4: Simplify right side
    608.76x = 486,010.09
  5. Step 5: Solve for x
    x = 486,010.09/608.76
  6. Step 6: Final answer
    x = 798.36

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Find fourth proportional to 304.38, 420.29 and 289.09
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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.