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Finding the Fourth Proportional to 665,159.16, 917,919.48 and 359,235.72

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Solution

The fourth proportional to 665,159.16, 917,919.48 and 359,235.72 is: 495,745.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,159.16 : 917,919.48 = 359,235.72 : x
  2. Step 2: Convert to fraction form
    665,159.16/917,919.48 = 359,235.72/x
  3. Step 3: Cross multiply
    665,159.16x = 917,919.48 × 359,235.72
  4. Step 4: Simplify right side
    665,159.16x = 329,749,465,299.83
  5. Step 5: Solve for x
    x = 329,749,465,299.83/665,159.16
  6. Step 6: Final answer
    x = 495,745.21

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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.