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Finding the Fourth Proportional to 260,605.10, 390,964.98 and 148,338.20

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Solution

The fourth proportional to 260,605.10, 390,964.98 and 148,338.20 is: 222,539.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,605.10 : 390,964.98 = 148,338.20 : x
  2. Step 2: Convert to fraction form
    260,605.10/390,964.98 = 148,338.20/x
  3. Step 3: Cross multiply
    260,605.10x = 390,964.98 × 148,338.20
  4. Step 4: Simplify right side
    260,605.10x = 57,995,041,396.24
  5. Step 5: Solve for x
    x = 57,995,041,396.24/260,605.10
  6. Step 6: Final answer
    x = 222,539.93

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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.