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Finding the Fourth Proportional to 581.23, 801.66 and 384.40

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Solution

The fourth proportional to 581.23, 801.66 and 384.40 is: 530.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.23 : 801.66 = 384.40 : x
  2. Step 2: Convert to fraction form
    581.23/801.66 = 384.40/x
  3. Step 3: Cross multiply
    581.23x = 801.66 × 384.40
  4. Step 4: Simplify right side
    581.23x = 308,158.10
  5. Step 5: Solve for x
    x = 308,158.10/581.23
  6. Step 6: Final answer
    x = 530.18

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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.