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Finding the Fourth Proportional to 430.88, 645.08 and 348.88

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Solution

The fourth proportional to 430.88, 645.08 and 348.88 is: 522.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.88 : 645.08 = 348.88 : x
  2. Step 2: Convert to fraction form
    430.88/645.08 = 348.88/x
  3. Step 3: Cross multiply
    430.88x = 645.08 × 348.88
  4. Step 4: Simplify right side
    430.88x = 225,055.51
  5. Step 5: Solve for x
    x = 225,055.51/430.88
  6. Step 6: Final answer
    x = 522.32

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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.