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Finding the Fourth Proportional to 660,804.70, 911,892.76 and 388,888.62

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Solution

The fourth proportional to 660,804.70, 911,892.76 and 388,888.62 is: 536,655.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,804.70 : 911,892.76 = 388,888.62 : x
  2. Step 2: Convert to fraction form
    660,804.70/911,892.76 = 388,888.62/x
  3. Step 3: Cross multiply
    660,804.70x = 911,892.76 × 388,888.62
  4. Step 4: Simplify right side
    660,804.70x = 354,624,717,024.39
  5. Step 5: Solve for x
    x = 354,624,717,024.39/660,804.70
  6. Step 6: Final answer
    x = 536,655.86

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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.