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Finding the Fourth Proportional to 286,334.40, 429,550.20 and 86,653.20

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Solution

The fourth proportional to 286,334.40, 429,550.20 and 86,653.20 is: 129,994.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,334.40 : 429,550.20 = 86,653.20 : x
  2. Step 2: Convert to fraction form
    286,334.40/429,550.20 = 86,653.20/x
  3. Step 3: Cross multiply
    286,334.40x = 429,550.20 × 86,653.20
  4. Step 4: Simplify right side
    286,334.40x = 37,221,899,390.64
  5. Step 5: Solve for x
    x = 37,221,899,390.64/286,334.40
  6. Step 6: Final answer
    x = 129,994.51

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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.