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Finding the Fourth Proportional to 1,277,312.22, 1,913,800.05 and 770,809.05

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Solution

The fourth proportional to 1,277,312.22, 1,913,800.05 and 770,809.05 is: 1,154,905.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277,312.22 : 1,913,800.05 = 770,809.05 : x
  2. Step 2: Convert to fraction form
    1,277,312.22/1,913,800.05 = 770,809.05/x
  3. Step 3: Cross multiply
    1,277,312.22x = 1,913,800.05 × 770,809.05
  4. Step 4: Simplify right side
    1,277,312.22x = 1,475,174,398,430.45
  5. Step 5: Solve for x
    x = 1,475,174,398,430.45/1,277,312.22
  6. Step 6: Final answer
    x = 1,154,905.10

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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.