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Finding the Fourth Proportional to 260,041.20, 389,478.60 and 260,041.20

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Solution

The fourth proportional to 260,041.20, 389,478.60 and 260,041.20 is: 389,478.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,041.20 : 389,478.60 = 260,041.20 : x
  2. Step 2: Convert to fraction form
    260,041.20/389,478.60 = 260,041.20/x
  3. Step 3: Cross multiply
    260,041.20x = 389,478.60 × 260,041.20
  4. Step 4: Simplify right side
    260,041.20x = 101,280,482,518.32
  5. Step 5: Solve for x
    x = 101,280,482,518.32/260,041.20
  6. Step 6: Final answer
    x = 389,478.60

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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.