Home / 690,838.53-953,319.13-380,680.03

Finding the Fourth Proportional to 690,838.53, 953,319.13 and 380,680.03

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Solution

The fourth proportional to 690,838.53, 953,319.13 and 380,680.03 is: 525,317.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,838.53 : 953,319.13 = 380,680.03 : x
  2. Step 2: Convert to fraction form
    690,838.53/953,319.13 = 380,680.03/x
  3. Step 3: Cross multiply
    690,838.53x = 953,319.13 × 380,680.03
  4. Step 4: Simplify right side
    690,838.53x = 362,909,555,007.97
  5. Step 5: Solve for x
    x = 362,909,555,007.97/690,838.53
  6. Step 6: Final answer
    x = 525,317.48

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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.