Home / 685,621.77-1,028,607.61-434,685.39

Finding the Fourth Proportional to 685,621.77, 1,028,607.61 and 434,685.39

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Solution

The fourth proportional to 685,621.77, 1,028,607.61 and 434,685.39 is: 652,139.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,621.77 : 1,028,607.61 = 434,685.39 : x
  2. Step 2: Convert to fraction form
    685,621.77/1,028,607.61 = 434,685.39/x
  3. Step 3: Cross multiply
    685,621.77x = 1,028,607.61 × 434,685.39
  4. Step 4: Simplify right side
    685,621.77x = 447,120,695,980.86
  5. Step 5: Solve for x
    x = 447,120,695,980.86/685,621.77
  6. Step 6: Final answer
    x = 652,139.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.