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Finding the Fourth Proportional to 448,425.63, 618,477.45 and 287,295.77

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Solution

The fourth proportional to 448,425.63, 618,477.45 and 287,295.77 is: 396,243.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,425.63 : 618,477.45 = 287,295.77 : x
  2. Step 2: Convert to fraction form
    448,425.63/618,477.45 = 287,295.77/x
  3. Step 3: Cross multiply
    448,425.63x = 618,477.45 × 287,295.77
  4. Step 4: Simplify right side
    448,425.63x = 177,685,955,225.39
  5. Step 5: Solve for x
    x = 177,685,955,225.39/448,425.63
  6. Step 6: Final answer
    x = 396,243.98

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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.