Home / 643,585.46-888,311.18-439,718.76

Finding the Fourth Proportional to 643,585.46, 888,311.18 and 439,718.76

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Solution

The fourth proportional to 643,585.46, 888,311.18 and 439,718.76 is: 606,923.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,585.46 : 888,311.18 = 439,718.76 : x
  2. Step 2: Convert to fraction form
    643,585.46/888,311.18 = 439,718.76/x
  3. Step 3: Cross multiply
    643,585.46x = 888,311.18 × 439,718.76
  4. Step 4: Simplify right side
    643,585.46x = 390,607,091,663.03
  5. Step 5: Solve for x
    x = 390,607,091,663.03/643,585.46
  6. Step 6: Final answer
    x = 606,923.43

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Double scale
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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.