Home / 666,139.29-997,630.59-381,984.21

Finding the Fourth Proportional to 666,139.29, 997,630.59 and 381,984.21

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Solution

The fourth proportional to 666,139.29, 997,630.59 and 381,984.21 is: 572,071.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,139.29 : 997,630.59 = 381,984.21 : x
  2. Step 2: Convert to fraction form
    666,139.29/997,630.59 = 381,984.21/x
  3. Step 3: Cross multiply
    666,139.29x = 997,630.59 × 381,984.21
  4. Step 4: Simplify right side
    666,139.29x = 381,079,132,792.98
  5. Step 5: Solve for x
    x = 381,079,132,792.98/666,139.29
  6. Step 6: Final answer
    x = 572,071.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.