Home / 686,466.53-947,428.67-438,215.72

Finding the Fourth Proportional to 686,466.53, 947,428.67 and 438,215.72

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Solution

The fourth proportional to 686,466.53, 947,428.67 and 438,215.72 is: 604,804.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,466.53 : 947,428.67 = 438,215.72 : x
  2. Step 2: Convert to fraction form
    686,466.53/947,428.67 = 438,215.72/x
  3. Step 3: Cross multiply
    686,466.53x = 947,428.67 × 438,215.72
  4. Step 4: Simplify right side
    686,466.53x = 415,178,135,995.41
  5. Step 5: Solve for x
    x = 415,178,135,995.41/686,466.53
  6. Step 6: Final answer
    x = 604,804.63

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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.