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Finding the Fourth Proportional to 260,011.80, 390,060.90 and 102,245.40

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Solution

The fourth proportional to 260,011.80, 390,060.90 and 102,245.40 is: 153,385.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,011.80 : 390,060.90 = 102,245.40 : x
  2. Step 2: Convert to fraction form
    260,011.80/390,060.90 = 102,245.40/x
  3. Step 3: Cross multiply
    260,011.80x = 390,060.90 × 102,245.40
  4. Step 4: Simplify right side
    260,011.80x = 39,881,932,744.86
  5. Step 5: Solve for x
    x = 39,881,932,744.86/260,011.80
  6. Step 6: Final answer
    x = 153,385.09

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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.