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Finding the Fourth Proportional to 260,416.80, 390,646.80 and 82,918.80

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Solution

The fourth proportional to 260,416.80, 390,646.80 and 82,918.80 is: 124,385.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,416.80 : 390,646.80 = 82,918.80 : x
  2. Step 2: Convert to fraction form
    260,416.80/390,646.80 = 82,918.80/x
  3. Step 3: Cross multiply
    260,416.80x = 390,646.80 × 82,918.80
  4. Step 4: Simplify right side
    260,416.80x = 32,391,963,879.84
  5. Step 5: Solve for x
    x = 32,391,963,879.84/260,416.80
  6. Step 6: Final answer
    x = 124,385.08

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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.