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Finding the Fourth Proportional to 315,855.54, 435,740.72 and 188,457.12

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Solution

The fourth proportional to 315,855.54, 435,740.72 and 188,457.12 is: 259,987.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,855.54 : 435,740.72 = 188,457.12 : x
  2. Step 2: Convert to fraction form
    315,855.54/435,740.72 = 188,457.12/x
  3. Step 3: Cross multiply
    315,855.54x = 435,740.72 × 188,457.12
  4. Step 4: Simplify right side
    315,855.54x = 82,118,440,215.64
  5. Step 5: Solve for x
    x = 82,118,440,215.64/315,855.54
  6. Step 6: Final answer
    x = 259,987.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.