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Finding the Fourth Proportional to 891,978.08, 1,230,938.78 and 484,083.54

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Solution

The fourth proportional to 891,978.08, 1,230,938.78 and 484,083.54 is: 668,040.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,978.08 : 1,230,938.78 = 484,083.54 : x
  2. Step 2: Convert to fraction form
    891,978.08/1,230,938.78 = 484,083.54/x
  3. Step 3: Cross multiply
    891,978.08x = 1,230,938.78 × 484,083.54
  4. Step 4: Simplify right side
    891,978.08x = 595,877,199,725.26
  5. Step 5: Solve for x
    x = 595,877,199,725.26/891,978.08
  6. Step 6: Final answer
    x = 668,040.19

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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.