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Finding the Fourth Proportional to 660,914.12, 912,069.78 and 359,113.16

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Solution

The fourth proportional to 660,914.12, 912,069.78 and 359,113.16 is: 495,580.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,914.12 : 912,069.78 = 359,113.16 : x
  2. Step 2: Convert to fraction form
    660,914.12/912,069.78 = 359,113.16/x
  3. Step 3: Cross multiply
    660,914.12x = 912,069.78 × 359,113.16
  4. Step 4: Simplify right side
    660,914.12x = 327,536,260,836.31
  5. Step 5: Solve for x
    x = 327,536,260,836.31/660,914.12
  6. Step 6: Final answer
    x = 495,580.67

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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.