Home / 712,456.94-983,193.72-390,169.28

Finding the Fourth Proportional to 712,456.94, 983,193.72 and 390,169.28

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Solution

The fourth proportional to 712,456.94, 983,193.72 and 390,169.28 is: 538,435.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,456.94 : 983,193.72 = 390,169.28 : x
  2. Step 2: Convert to fraction form
    712,456.94/983,193.72 = 390,169.28/x
  3. Step 3: Cross multiply
    712,456.94x = 983,193.72 × 390,169.28
  4. Step 4: Simplify right side
    712,456.94x = 383,611,985,832.92
  5. Step 5: Solve for x
    x = 383,611,985,832.92/712,456.94
  6. Step 6: Final answer
    x = 538,435.33

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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.