Home / 712,919.43-983,828.82-390,641.76

Finding the Fourth Proportional to 712,919.43, 983,828.82 and 390,641.76

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Solution

The fourth proportional to 712,919.43, 983,828.82 and 390,641.76 is: 539,085.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,919.43 : 983,828.82 = 390,641.76 : x
  2. Step 2: Convert to fraction form
    712,919.43/983,828.82 = 390,641.76/x
  3. Step 3: Cross multiply
    712,919.43x = 983,828.82 × 390,641.76
  4. Step 4: Simplify right side
    712,919.43x = 384,324,621,783.52
  5. Step 5: Solve for x
    x = 384,324,621,783.52/712,919.43
  6. Step 6: Final answer
    x = 539,085.63

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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.