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Finding the Fourth Proportional to 260,000.80, 390,074.10 and 110,312.80

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Solution

The fourth proportional to 260,000.80, 390,074.10 and 110,312.80 is: 165,500.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,000.80 : 390,074.10 = 110,312.80 : x
  2. Step 2: Convert to fraction form
    260,000.80/390,074.10 = 110,312.80/x
  3. Step 3: Cross multiply
    260,000.80x = 390,074.10 × 110,312.80
  4. Step 4: Simplify right side
    260,000.80x = 43,030,166,178.48
  5. Step 5: Solve for x
    x = 43,030,166,178.48/260,000.80
  6. Step 6: Final answer
    x = 165,500.13

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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.