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Finding the Fourth Proportional to 608.55, 915.53 and 570.21

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Solution

The fourth proportional to 608.55, 915.53 and 570.21 is: 857.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.55 : 915.53 = 570.21 : x
  2. Step 2: Convert to fraction form
    608.55/915.53 = 570.21/x
  3. Step 3: Cross multiply
    608.55x = 915.53 × 570.21
  4. Step 4: Simplify right side
    608.55x = 522,041.51
  5. Step 5: Solve for x
    x = 522,041.51/608.55
  6. Step 6: Final answer
    x = 857.84

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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.