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Finding the Fourth Proportional to 686,920, 947,627.04 and 485,826.88

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Solution

The fourth proportional to 686,920, 947,627.04 and 485,826.88 is: 670,212.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,920 : 947,627.04 = 485,826.88 : x
  2. Step 2: Convert to fraction form
    686,920/947,627.04 = 485,826.88/x
  3. Step 3: Cross multiply
    686,920x = 947,627.04 × 485,826.88
  4. Step 4: Simplify right side
    686,920x = 460,382,688,246.84
  5. Step 5: Solve for x
    x = 460,382,688,246.84/686,920
  6. Step 6: Final answer
    x = 670,212.96

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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.