Home / 1,290,302.52-1,780,516.50-717,307.80

Finding the Fourth Proportional to 1,290,302.52, 1,780,516.50 and 717,307.80

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Solution

The fourth proportional to 1,290,302.52, 1,780,516.50 and 717,307.80 is: 989,828.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,302.52 : 1,780,516.50 = 717,307.80 : x
  2. Step 2: Convert to fraction form
    1,290,302.52/1,780,516.50 = 717,307.80/x
  3. Step 3: Cross multiply
    1,290,302.52x = 1,780,516.50 × 717,307.80
  4. Step 4: Simplify right side
    1,290,302.52x = 1,277,178,373,478.70
  5. Step 5: Solve for x
    x = 1,277,178,373,478.70/1,290,302.52
  6. Step 6: Final answer
    x = 989,828.63

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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.