Home / 917,775.40-1,376,663.10-419,139.40

Finding the Fourth Proportional to 917,775.40, 1,376,663.10 and 419,139.40

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Solution

The fourth proportional to 917,775.40, 1,376,663.10 and 419,139.40 is: 628,709.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,775.40 : 1,376,663.10 = 419,139.40 : x
  2. Step 2: Convert to fraction form
    917,775.40/1,376,663.10 = 419,139.40/x
  3. Step 3: Cross multiply
    917,775.40x = 1,376,663.10 × 419,139.40
  4. Step 4: Simplify right side
    917,775.40x = 577,013,745,736.14
  5. Step 5: Solve for x
    x = 577,013,745,736.14/917,775.40
  6. Step 6: Final answer
    x = 628,709.10

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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.