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Finding the Fourth Proportional to 686,694.90, 947,641.02 and 380,792.82

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Solution

The fourth proportional to 686,694.90, 947,641.02 and 380,792.82 is: 525,495.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,694.90 : 947,641.02 = 380,792.82 : x
  2. Step 2: Convert to fraction form
    686,694.90/947,641.02 = 380,792.82/x
  3. Step 3: Cross multiply
    686,694.90x = 947,641.02 × 380,792.82
  4. Step 4: Simplify right side
    686,694.90x = 360,854,896,353.48
  5. Step 5: Solve for x
    x = 360,854,896,353.48/686,694.90
  6. Step 6: Final answer
    x = 525,495.23

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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.