Home / 645,288.12-963,182.34-561,637.80

Finding the Fourth Proportional to 645,288.12, 963,182.34 and 561,637.80

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Solution

The fourth proportional to 645,288.12, 963,182.34 and 561,637.80 is: 838,322.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,288.12 : 963,182.34 = 561,637.80 : x
  2. Step 2: Convert to fraction form
    645,288.12/963,182.34 = 561,637.80/x
  3. Step 3: Cross multiply
    645,288.12x = 963,182.34 × 561,637.80
  4. Step 4: Simplify right side
    645,288.12x = 540,959,610,436.45
  5. Step 5: Solve for x
    x = 540,959,610,436.45/645,288.12
  6. Step 6: Final answer
    x = 838,322.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.