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Finding the Fourth Proportional to 660,746.25, 911,752.47 and 388,754.33

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Solution

The fourth proportional to 660,746.25, 911,752.47 and 388,754.33 is: 536,435.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,746.25 : 911,752.47 = 388,754.33 : x
  2. Step 2: Convert to fraction form
    660,746.25/911,752.47 = 388,754.33/x
  3. Step 3: Cross multiply
    660,746.25x = 911,752.47 × 388,754.33
  4. Step 4: Simplify right side
    660,746.25x = 354,447,716,041.93
  5. Step 5: Solve for x
    x = 354,447,716,041.93/660,746.25
  6. Step 6: Final answer
    x = 536,435.46

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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.