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Finding the Fourth Proportional to 623.84, 933.96 and 430.88

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Solution

The fourth proportional to 623.84, 933.96 and 430.88 is: 645.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.84 : 933.96 = 430.88 : x
  2. Step 2: Convert to fraction form
    623.84/933.96 = 430.88/x
  3. Step 3: Cross multiply
    623.84x = 933.96 × 430.88
  4. Step 4: Simplify right side
    623.84x = 402,424.68
  5. Step 5: Solve for x
    x = 402,424.68/623.84
  6. Step 6: Final answer
    x = 645.08

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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.