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Finding the Fourth Proportional to 915,641.64, 1,263,715.02 and 507,833.64

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Solution

The fourth proportional to 915,641.64, 1,263,715.02 and 507,833.64 is: 700,882.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,641.64 : 1,263,715.02 = 507,833.64 : x
  2. Step 2: Convert to fraction form
    915,641.64/1,263,715.02 = 507,833.64/x
  3. Step 3: Cross multiply
    915,641.64x = 1,263,715.02 × 507,833.64
  4. Step 4: Simplify right side
    915,641.64x = 641,756,998,529.27
  5. Step 5: Solve for x
    x = 641,756,998,529.27/915,641.64
  6. Step 6: Final answer
    x = 700,882.28

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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.