Home / 762,720.30-1,145,210.40-426,432.60

Finding the Fourth Proportional to 762,720.30, 1,145,210.40 and 426,432.60

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Solution

The fourth proportional to 762,720.30, 1,145,210.40 and 426,432.60 is: 640,280.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    762,720.30 : 1,145,210.40 = 426,432.60 : x
  2. Step 2: Convert to fraction form
    762,720.30/1,145,210.40 = 426,432.60/x
  3. Step 3: Cross multiply
    762,720.30x = 1,145,210.40 × 426,432.60
  4. Step 4: Simplify right side
    762,720.30x = 488,355,048,419.04
  5. Step 5: Solve for x
    x = 488,355,048,419.04/762,720.30
  6. Step 6: Final answer
    x = 640,280.65

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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.