Home / 762,509.60-1,143,764.40-420,025.40

Finding the Fourth Proportional to 762,509.60, 1,143,764.40 and 420,025.40

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Solution

The fourth proportional to 762,509.60, 1,143,764.40 and 420,025.40 is: 630,038.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    762,509.60 : 1,143,764.40 = 420,025.40 : x
  2. Step 2: Convert to fraction form
    762,509.60/1,143,764.40 = 420,025.40/x
  3. Step 3: Cross multiply
    762,509.60x = 1,143,764.40 × 420,025.40
  4. Step 4: Simplify right side
    762,509.60x = 480,410,099,615.76
  5. Step 5: Solve for x
    x = 480,410,099,615.76/762,509.60
  6. Step 6: Final answer
    x = 630,038.10

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Double scale
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Similar ratio
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1.5x scale

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.