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Finding the Fourth Proportional to 623.30, 933.60 and 554.90

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Solution

The fourth proportional to 623.30, 933.60 and 554.90 is: 831.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.30 : 933.60 = 554.90 : x
  2. Step 2: Convert to fraction form
    623.30/933.60 = 554.90/x
  3. Step 3: Cross multiply
    623.30x = 933.60 × 554.90
  4. Step 4: Simplify right side
    623.30x = 518,054.64
  5. Step 5: Solve for x
    x = 518,054.64/623.30
  6. Step 6: Final answer
    x = 831.15

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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.