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Finding the Fourth Proportional to 915,783.84, 1,263,758.76 and 507,879.72

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Solution

The fourth proportional to 915,783.84, 1,263,758.76 and 507,879.72 is: 700,861.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,783.84 : 1,263,758.76 = 507,879.72 : x
  2. Step 2: Convert to fraction form
    915,783.84/1,263,758.76 = 507,879.72/x
  3. Step 3: Cross multiply
    915,783.84x = 1,263,758.76 × 507,879.72
  4. Step 4: Simplify right side
    915,783.84x = 641,837,445,176.35
  5. Step 5: Solve for x
    x = 641,837,445,176.35/915,783.84
  6. Step 6: Final answer
    x = 700,861.29

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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.