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Finding the Fourth Proportional to 430.35, 645.54 and 358.08

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Solution

The fourth proportional to 430.35, 645.54 and 358.08 is: 537.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.35 : 645.54 = 358.08 : x
  2. Step 2: Convert to fraction form
    430.35/645.54 = 358.08/x
  3. Step 3: Cross multiply
    430.35x = 645.54 × 358.08
  4. Step 4: Simplify right side
    430.35x = 231,154.96
  5. Step 5: Solve for x
    x = 231,154.96/430.35
  6. Step 6: Final answer
    x = 537.13

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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.