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Finding the Fourth Proportional to 388,779.80, 583,169.70 and 164,393.60

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Solution

The fourth proportional to 388,779.80, 583,169.70 and 164,393.60 is: 246,590.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,779.80 : 583,169.70 = 164,393.60 : x
  2. Step 2: Convert to fraction form
    388,779.80/583,169.70 = 164,393.60/x
  3. Step 3: Cross multiply
    388,779.80x = 583,169.70 × 164,393.60
  4. Step 4: Simplify right side
    388,779.80x = 95,869,366,393.92
  5. Step 5: Solve for x
    x = 95,869,366,393.92/388,779.80
  6. Step 6: Final answer
    x = 246,590.40

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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.