Home / 712,736.98-983,588.18-390,425.80

Finding the Fourth Proportional to 712,736.98, 983,588.18 and 390,425.80

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Solution

The fourth proportional to 712,736.98, 983,588.18 and 390,425.80 is: 538,793.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,736.98 : 983,588.18 = 390,425.80 : x
  2. Step 2: Convert to fraction form
    712,736.98/983,588.18 = 390,425.80/x
  3. Step 3: Cross multiply
    712,736.98x = 983,588.18 × 390,425.80
  4. Step 4: Simplify right side
    712,736.98x = 384,018,202,047.04
  5. Step 5: Solve for x
    x = 384,018,202,047.04/712,736.98
  6. Step 6: Final answer
    x = 538,793.71

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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.