Home / 762,505.60-1,143,758.40-420,021.40

Finding the Fourth Proportional to 762,505.60, 1,143,758.40 and 420,021.40

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Solution

The fourth proportional to 762,505.60, 1,143,758.40 and 420,021.40 is: 630,032.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    762,505.60 : 1,143,758.40 = 420,021.40 : x
  2. Step 2: Convert to fraction form
    762,505.60/1,143,758.40 = 420,021.40/x
  3. Step 3: Cross multiply
    762,505.60x = 1,143,758.40 × 420,021.40
  4. Step 4: Simplify right side
    762,505.60x = 480,403,004,429.76
  5. Step 5: Solve for x
    x = 480,403,004,429.76/762,505.60
  6. Step 6: Final answer
    x = 630,032.10

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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.