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Finding the Fourth Proportional to 384.30, 530.10 and 253.08

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Solution

The fourth proportional to 384.30, 530.10 and 253.08 is: 349.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.30 : 530.10 = 253.08 : x
  2. Step 2: Convert to fraction form
    384.30/530.10 = 253.08/x
  3. Step 3: Cross multiply
    384.30x = 530.10 × 253.08
  4. Step 4: Simplify right side
    384.30x = 134,157.71
  5. Step 5: Solve for x
    x = 134,157.71/384.30
  6. Step 6: Final answer
    x = 349.10

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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.