Home / 712,710.26-983,540.40-390,431.96

Finding the Fourth Proportional to 712,710.26, 983,540.40 and 390,431.96

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Solution

The fourth proportional to 712,710.26, 983,540.40 and 390,431.96 is: 538,796.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,710.26 : 983,540.40 = 390,431.96 : x
  2. Step 2: Convert to fraction form
    712,710.26/983,540.40 = 390,431.96/x
  3. Step 3: Cross multiply
    712,710.26x = 983,540.40 × 390,431.96
  4. Step 4: Simplify right side
    712,710.26x = 384,005,606,111.18
  5. Step 5: Solve for x
    x = 384,005,606,111.18/712,710.26
  6. Step 6: Final answer
    x = 538,796.24

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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.