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Finding the Fourth Proportional to 261,693.28, 392,290.57 and 84,075.63

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Solution

The fourth proportional to 261,693.28, 392,290.57 and 84,075.63 is: 126,033.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,693.28 : 392,290.57 = 84,075.63 : x
  2. Step 2: Convert to fraction form
    261,693.28/392,290.57 = 84,075.63/x
  3. Step 3: Cross multiply
    261,693.28x = 392,290.57 × 84,075.63
  4. Step 4: Simplify right side
    261,693.28x = 32,982,076,815.81
  5. Step 5: Solve for x
    x = 32,982,076,815.81/261,693.28
  6. Step 6: Final answer
    x = 126,033.33

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1.5x scale

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.