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Finding the Fourth Proportional to 638,085.60, 863,281.80 and 638,085.60

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Solution

The fourth proportional to 638,085.60, 863,281.80 and 638,085.60 is: 863,281.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,085.60 : 863,281.80 = 638,085.60 : x
  2. Step 2: Convert to fraction form
    638,085.60/863,281.80 = 638,085.60/x
  3. Step 3: Cross multiply
    638,085.60x = 863,281.80 × 638,085.60
  4. Step 4: Simplify right side
    638,085.60x = 550,847,685,322.08
  5. Step 5: Solve for x
    x = 550,847,685,322.08/638,085.60
  6. Step 6: Final answer
    x = 863,281.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.