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Finding the Fourth Proportional to 874,479.81, 1,312,467.40 and 342,374.51

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Solution

The fourth proportional to 874,479.81, 1,312,467.40 and 342,374.51 is: 513,854.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,479.81 : 1,312,467.40 = 342,374.51 : x
  2. Step 2: Convert to fraction form
    874,479.81/1,312,467.40 = 342,374.51/x
  3. Step 3: Cross multiply
    874,479.81x = 1,312,467.40 × 342,374.51
  4. Step 4: Simplify right side
    874,479.81x = 449,355,382,965.97
  5. Step 5: Solve for x
    x = 449,355,382,965.97/874,479.81
  6. Step 6: Final answer
    x = 513,854.50

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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.