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Finding the Fourth Proportional to 424,085.20, 636,127.80 and 354,619.60

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Solution

The fourth proportional to 424,085.20, 636,127.80 and 354,619.60 is: 531,929.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,085.20 : 636,127.80 = 354,619.60 : x
  2. Step 2: Convert to fraction form
    424,085.20/636,127.80 = 354,619.60/x
  3. Step 3: Cross multiply
    424,085.20x = 636,127.80 × 354,619.60
  4. Step 4: Simplify right side
    424,085.20x = 225,583,385,984.88
  5. Step 5: Solve for x
    x = 225,583,385,984.88/424,085.20
  6. Step 6: Final answer
    x = 531,929.40

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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.