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Finding the Fourth Proportional to 780,164.60, 1,170,246.90 and 479,670.80

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Solution

The fourth proportional to 780,164.60, 1,170,246.90 and 479,670.80 is: 719,506.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,164.60 : 1,170,246.90 = 479,670.80 : x
  2. Step 2: Convert to fraction form
    780,164.60/1,170,246.90 = 479,670.80/x
  3. Step 3: Cross multiply
    780,164.60x = 1,170,246.90 × 479,670.80
  4. Step 4: Simplify right side
    780,164.60x = 561,333,266,720.52
  5. Step 5: Solve for x
    x = 561,333,266,720.52/780,164.60
  6. Step 6: Final answer
    x = 719,506.20

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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.