Home / 1,290,516.40-1,780,906.80-717,522.40

Finding the Fourth Proportional to 1,290,516.40, 1,780,906.80 and 717,522.40

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Solution

The fourth proportional to 1,290,516.40, 1,780,906.80 and 717,522.40 is: 990,177.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,516.40 : 1,780,906.80 = 717,522.40 : x
  2. Step 2: Convert to fraction form
    1,290,516.40/1,780,906.80 = 717,522.40/x
  3. Step 3: Cross multiply
    1,290,516.40x = 1,780,906.80 × 717,522.40
  4. Step 4: Simplify right side
    1,290,516.40x = 1,277,840,521,312.32
  5. Step 5: Solve for x
    x = 1,277,840,521,312.32/1,290,516.40
  6. Step 6: Final answer
    x = 990,177.67

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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.