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Finding the Fourth Proportional to 479,186.40, 718,779.60 and 146,719.20

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Solution

The fourth proportional to 479,186.40, 718,779.60 and 146,719.20 is: 220,078.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,186.40 : 718,779.60 = 146,719.20 : x
  2. Step 2: Convert to fraction form
    479,186.40/718,779.60 = 146,719.20/x
  3. Step 3: Cross multiply
    479,186.40x = 718,779.60 × 146,719.20
  4. Step 4: Simplify right side
    479,186.40x = 105,458,767,888.32
  5. Step 5: Solve for x
    x = 105,458,767,888.32/479,186.40
  6. Step 6: Final answer
    x = 220,078.80

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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.