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Finding the Fourth Proportional to 1,076,938.20, 1,615,407.30 and 866,986.20

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Solution

The fourth proportional to 1,076,938.20, 1,615,407.30 and 866,986.20 is: 1,300,479.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,076,938.20 : 1,615,407.30 = 866,986.20 : x
  2. Step 2: Convert to fraction form
    1,076,938.20/1,615,407.30 = 866,986.20/x
  3. Step 3: Cross multiply
    1,076,938.20x = 1,615,407.30 × 866,986.20
  4. Step 4: Simplify right side
    1,076,938.20x = 1,400,535,836,479.26
  5. Step 5: Solve for x
    x = 1,400,535,836,479.26/1,076,938.20
  6. Step 6: Final answer
    x = 1,300,479.30

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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.