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Finding the Fourth Proportional to 646,639.51, 892,205.14 and 425,854.01

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Solution

The fourth proportional to 646,639.51, 892,205.14 and 425,854.01 is: 587,574.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,639.51 : 892,205.14 = 425,854.01 : x
  2. Step 2: Convert to fraction form
    646,639.51/892,205.14 = 425,854.01/x
  3. Step 3: Cross multiply
    646,639.51x = 892,205.14 × 425,854.01
  4. Step 4: Simplify right side
    646,639.51x = 379,949,136,611.61
  5. Step 5: Solve for x
    x = 379,949,136,611.61/646,639.51
  6. Step 6: Final answer
    x = 587,574.89

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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.