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Finding the Fourth Proportional to 978,779.70, 1,468,169.55 and 624,485.70

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Solution

The fourth proportional to 978,779.70, 1,468,169.55 and 624,485.70 is: 936,728.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,779.70 : 1,468,169.55 = 624,485.70 : x
  2. Step 2: Convert to fraction form
    978,779.70/1,468,169.55 = 624,485.70/x
  3. Step 3: Cross multiply
    978,779.70x = 1,468,169.55 × 624,485.70
  4. Step 4: Simplify right side
    978,779.70x = 916,850,889,150.44
  5. Step 5: Solve for x
    x = 916,850,889,150.44/978,779.70
  6. Step 6: Final answer
    x = 936,728.55

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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.