Home / 639,132.66-881,880.15-384,500.22

Finding the Fourth Proportional to 639,132.66, 881,880.15 and 384,500.22

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Solution

The fourth proportional to 639,132.66, 881,880.15 and 384,500.22 is: 530,536.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,132.66 : 881,880.15 = 384,500.22 : x
  2. Step 2: Convert to fraction form
    639,132.66/881,880.15 = 384,500.22/x
  3. Step 3: Cross multiply
    639,132.66x = 881,880.15 × 384,500.22
  4. Step 4: Simplify right side
    639,132.66x = 339,083,111,688.63
  5. Step 5: Solve for x
    x = 339,083,111,688.63/639,132.66
  6. Step 6: Final answer
    x = 530,536.35

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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.