Home / 712,618.44-983,427.60-390,328.56

Finding the Fourth Proportional to 712,618.44, 983,427.60 and 390,328.56

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Solution

The fourth proportional to 712,618.44, 983,427.60 and 390,328.56 is: 538,661.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,618.44 : 983,427.60 = 390,328.56 : x
  2. Step 2: Convert to fraction form
    712,618.44/983,427.60 = 390,328.56/x
  3. Step 3: Cross multiply
    712,618.44x = 983,427.60 × 390,328.56
  4. Step 4: Simplify right side
    712,618.44x = 383,859,878,972.26
  5. Step 5: Solve for x
    x = 383,859,878,972.26/712,618.44
  6. Step 6: Final answer
    x = 538,661.16

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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.