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Finding the Fourth Proportional to 661,362.80, 912,639.80 and 370,958.40

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Solution

The fourth proportional to 661,362.80, 912,639.80 and 370,958.40 is: 511,899.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,362.80 : 912,639.80 = 370,958.40 : x
  2. Step 2: Convert to fraction form
    661,362.80/912,639.80 = 370,958.40/x
  3. Step 3: Cross multiply
    661,362.80x = 912,639.80 × 370,958.40
  4. Step 4: Simplify right side
    661,362.80x = 338,551,399,984.32
  5. Step 5: Solve for x
    x = 338,551,399,984.32/661,362.80
  6. Step 6: Final answer
    x = 511,899.67

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1.5x scale

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.