Home / 686,706.09-947,665.74-380,795.38

Finding the Fourth Proportional to 686,706.09, 947,665.74 and 380,795.38

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Solution

The fourth proportional to 686,706.09, 947,665.74 and 380,795.38 is: 525,503.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,706.09 : 947,665.74 = 380,795.38 : x
  2. Step 2: Convert to fraction form
    686,706.09/947,665.74 = 380,795.38/x
  3. Step 3: Cross multiply
    686,706.09x = 947,665.74 × 380,795.38
  4. Step 4: Simplify right side
    686,706.09x = 360,866,734,635.10
  5. Step 5: Solve for x
    x = 360,866,734,635.10/686,706.09
  6. Step 6: Final answer
    x = 525,503.91

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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.