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Finding the Fourth Proportional to 570.65, 787.76 and 384.26

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Solution

The fourth proportional to 570.65, 787.76 and 384.26 is: 530.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.65 : 787.76 = 384.26 : x
  2. Step 2: Convert to fraction form
    570.65/787.76 = 384.26/x
  3. Step 3: Cross multiply
    570.65x = 787.76 × 384.26
  4. Step 4: Simplify right side
    570.65x = 302,704.66
  5. Step 5: Solve for x
    x = 302,704.66/570.65
  6. Step 6: Final answer
    x = 530.46

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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.