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Finding the Fourth Proportional to 1,174,916.72, 1,621,465.20 and 665,623.28

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Solution

The fourth proportional to 1,174,916.72, 1,621,465.20 and 665,623.28 is: 918,605.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174,916.72 : 1,621,465.20 = 665,623.28 : x
  2. Step 2: Convert to fraction form
    1,174,916.72/1,621,465.20 = 665,623.28/x
  3. Step 3: Cross multiply
    1,174,916.72x = 1,621,465.20 × 665,623.28
  4. Step 4: Simplify right side
    1,174,916.72x = 1,079,284,984,829.86
  5. Step 5: Solve for x
    x = 1,079,284,984,829.86/1,174,916.72
  6. Step 6: Final answer
    x = 918,605.52

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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.