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Finding the Fourth Proportional to 393,378.90, 590,511.83 and 260,518.65

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Solution

The fourth proportional to 393,378.90, 590,511.83 and 260,518.65 is: 391,071.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,378.90 : 590,511.83 = 260,518.65 : x
  2. Step 2: Convert to fraction form
    393,378.90/590,511.83 = 260,518.65/x
  3. Step 3: Cross multiply
    393,378.90x = 590,511.83 × 260,518.65
  4. Step 4: Simplify right side
    393,378.90x = 153,839,343,458.04
  5. Step 5: Solve for x
    x = 153,839,343,458.04/393,378.90
  6. Step 6: Final answer
    x = 391,071.67

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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.