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Finding the Fourth Proportional to 665,218.85, 918,001.67 and 359,295.08

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Solution

The fourth proportional to 665,218.85, 918,001.67 and 359,295.08 is: 495,827.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,218.85 : 918,001.67 = 359,295.08 : x
  2. Step 2: Convert to fraction form
    665,218.85/918,001.67 = 359,295.08/x
  3. Step 3: Cross multiply
    665,218.85x = 918,001.67 × 359,295.08
  4. Step 4: Simplify right side
    665,218.85x = 329,833,477,076.30
  5. Step 5: Solve for x
    x = 329,833,477,076.30/665,218.85
  6. Step 6: Final answer
    x = 495,827.02

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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.