Home / 712,684.14-983,504.31-390,405.78

Finding the Fourth Proportional to 712,684.14, 983,504.31 and 390,405.78

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Solution

The fourth proportional to 712,684.14, 983,504.31 and 390,405.78 is: 538,760.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,684.14 : 983,504.31 = 390,405.78 : x
  2. Step 2: Convert to fraction form
    712,684.14/983,504.31 = 390,405.78/x
  3. Step 3: Cross multiply
    712,684.14x = 983,504.31 × 390,405.78
  4. Step 4: Simplify right side
    712,684.14x = 383,965,767,278.91
  5. Step 5: Solve for x
    x = 383,965,767,278.91/712,684.14
  6. Step 6: Final answer
    x = 538,760.08

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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.