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Finding the Fourth Proportional to 358,808.50, 535,401.68 and 321,109.48

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Solution

The fourth proportional to 358,808.50, 535,401.68 and 321,109.48 is: 479,148.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,808.50 : 535,401.68 = 321,109.48 : x
  2. Step 2: Convert to fraction form
    358,808.50/535,401.68 = 321,109.48/x
  3. Step 3: Cross multiply
    358,808.50x = 535,401.68 × 321,109.48
  4. Step 4: Simplify right side
    358,808.50x = 171,922,555,055.93
  5. Step 5: Solve for x
    x = 171,922,555,055.93/358,808.50
  6. Step 6: Final answer
    x = 479,148.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.