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Finding the Fourth Proportional to 621,140.40, 931,710.60 and 463,676.40

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Solution

The fourth proportional to 621,140.40, 931,710.60 and 463,676.40 is: 695,514.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,140.40 : 931,710.60 = 463,676.40 : x
  2. Step 2: Convert to fraction form
    621,140.40/931,710.60 = 463,676.40/x
  3. Step 3: Cross multiply
    621,140.40x = 931,710.60 × 463,676.40
  4. Step 4: Simplify right side
    621,140.40x = 432,012,216,849.84
  5. Step 5: Solve for x
    x = 432,012,216,849.84/621,140.40
  6. Step 6: Final answer
    x = 695,514.60

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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.