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Finding the Fourth Proportional to 674,904.03, 931,392.42 and 369,000.78

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Solution

The fourth proportional to 674,904.03, 931,392.42 and 369,000.78 is: 509,234.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,904.03 : 931,392.42 = 369,000.78 : x
  2. Step 2: Convert to fraction form
    674,904.03/931,392.42 = 369,000.78/x
  3. Step 3: Cross multiply
    674,904.03x = 931,392.42 × 369,000.78
  4. Step 4: Simplify right side
    674,904.03x = 343,684,529,466.09
  5. Step 5: Solve for x
    x = 343,684,529,466.09/674,904.03
  6. Step 6: Final answer
    x = 509,234.67

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Double scale
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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.