Home / 686,258.70-1,029,388.05-509,111.70

Finding the Fourth Proportional to 686,258.70, 1,029,388.05 and 509,111.70

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Solution

The fourth proportional to 686,258.70, 1,029,388.05 and 509,111.70 is: 763,667.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,258.70 : 1,029,388.05 = 509,111.70 : x
  2. Step 2: Convert to fraction form
    686,258.70/1,029,388.05 = 509,111.70/x
  3. Step 3: Cross multiply
    686,258.70x = 1,029,388.05 × 509,111.70
  4. Step 4: Simplify right side
    686,258.70x = 524,073,500,095.19
  5. Step 5: Solve for x
    x = 524,073,500,095.19/686,258.70
  6. Step 6: Final answer
    x = 763,667.55

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Half scale
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Double scale
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Similar ratio
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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.