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Finding the Fourth Proportional to 448,445.61, 618,699.69 and 287,389.44

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Solution

The fourth proportional to 448,445.61, 618,699.69 and 287,389.44 is: 396,497.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,445.61 : 618,699.69 = 287,389.44 : x
  2. Step 2: Convert to fraction form
    448,445.61/618,699.69 = 287,389.44/x
  3. Step 3: Cross multiply
    448,445.61x = 618,699.69 × 287,389.44
  4. Step 4: Simplify right side
    448,445.61x = 177,807,757,437.27
  5. Step 5: Solve for x
    x = 177,807,757,437.27/448,445.61
  6. Step 6: Final answer
    x = 396,497.93

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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.