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Finding the Fourth Proportional to 430.89, 643.20 and 373.52

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Solution

The fourth proportional to 430.89, 643.20 and 373.52 is: 557.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.89 : 643.20 = 373.52 : x
  2. Step 2: Convert to fraction form
    430.89/643.20 = 373.52/x
  3. Step 3: Cross multiply
    430.89x = 643.20 × 373.52
  4. Step 4: Simplify right side
    430.89x = 240,244.85
  5. Step 5: Solve for x
    x = 240,244.85/430.89
  6. Step 6: Final answer
    x = 557.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.