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Finding the Fourth Proportional to 1,316.68, 1,975.59 and 623.84

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Solution

The fourth proportional to 1,316.68, 1,975.59 and 623.84 is: 936.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.68 : 1,975.59 = 623.84 : x
  2. Step 2: Convert to fraction form
    1,316.68/1,975.59 = 623.84/x
  3. Step 3: Cross multiply
    1,316.68x = 1,975.59 × 623.84
  4. Step 4: Simplify right side
    1,316.68x = 1,232,442.19
  5. Step 5: Solve for x
    x = 1,232,442.19/1,316.68
  6. Step 6: Final answer
    x = 936.02

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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.