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Finding the Fourth Proportional to 660,801.67, 911,888.58 and 388,885.58

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Solution

The fourth proportional to 660,801.67, 911,888.58 and 388,885.58 is: 536,651.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,801.67 : 911,888.58 = 388,885.58 : x
  2. Step 2: Convert to fraction form
    660,801.67/911,888.58 = 388,885.58/x
  3. Step 3: Cross multiply
    660,801.67x = 911,888.58 × 388,885.58
  4. Step 4: Simplify right side
    660,801.67x = 354,620,319,328.68
  5. Step 5: Solve for x
    x = 354,620,319,328.68/660,801.67
  6. Step 6: Final answer
    x = 536,651.67

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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.