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Finding the Fourth Proportional to 665,219.85, 918,003.04 and 359,296.08

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Solution

The fourth proportional to 665,219.85, 918,003.04 and 359,296.08 is: 495,828.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,219.85 : 918,003.04 = 359,296.08 : x
  2. Step 2: Convert to fraction form
    665,219.85/918,003.04 = 359,296.08/x
  3. Step 3: Cross multiply
    665,219.85x = 918,003.04 × 359,296.08
  4. Step 4: Simplify right side
    665,219.85x = 329,834,893,700.08
  5. Step 5: Solve for x
    x = 329,834,893,700.08/665,219.85
  6. Step 6: Final answer
    x = 495,828.40

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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.