Home / 1,119,909.60-1,679,864.40-721,000.80

Finding the Fourth Proportional to 1,119,909.60, 1,679,864.40 and 721,000.80

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Solution

The fourth proportional to 1,119,909.60, 1,679,864.40 and 721,000.80 is: 1,081,501.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119,909.60 : 1,679,864.40 = 721,000.80 : x
  2. Step 2: Convert to fraction form
    1,119,909.60/1,679,864.40 = 721,000.80/x
  3. Step 3: Cross multiply
    1,119,909.60x = 1,679,864.40 × 721,000.80
  4. Step 4: Simplify right side
    1,119,909.60x = 1,211,183,576,291.52
  5. Step 5: Solve for x
    x = 1,211,183,576,291.52/1,119,909.60
  6. Step 6: Final answer
    x = 1,081,501.20

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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.