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Finding the Fourth Proportional to 686,700.92, 947,649.32 and 380,798.84

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Solution

The fourth proportional to 686,700.92, 947,649.32 and 380,798.84 is: 525,503.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,700.92 : 947,649.32 = 380,798.84 : x
  2. Step 2: Convert to fraction form
    686,700.92/947,649.32 = 380,798.84/x
  3. Step 3: Cross multiply
    686,700.92x = 947,649.32 × 380,798.84
  4. Step 4: Simplify right side
    686,700.92x = 360,863,761,782.79
  5. Step 5: Solve for x
    x = 360,863,761,782.79/686,700.92
  6. Step 6: Final answer
    x = 525,503.54

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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.