Home / 678,129.20-1,018,360.20-442,516.40

Finding the Fourth Proportional to 678,129.20, 1,018,360.20 and 442,516.40

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Solution

The fourth proportional to 678,129.20, 1,018,360.20 and 442,516.40 is: 664,535.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,129.20 : 1,018,360.20 = 442,516.40 : x
  2. Step 2: Convert to fraction form
    678,129.20/1,018,360.20 = 442,516.40/x
  3. Step 3: Cross multiply
    678,129.20x = 1,018,360.20 × 442,516.40
  4. Step 4: Simplify right side
    678,129.20x = 450,641,089,607.28
  5. Step 5: Solve for x
    x = 450,641,089,607.28/678,129.20
  6. Step 6: Final answer
    x = 664,535.74

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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.