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Finding the Fourth Proportional to 660,746.63, 911,752.98 and 388,754.70

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Solution

The fourth proportional to 660,746.63, 911,752.98 and 388,754.70 is: 536,435.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,746.63 : 911,752.98 = 388,754.70 : x
  2. Step 2: Convert to fraction form
    660,746.63/911,752.98 = 388,754.70/x
  3. Step 3: Cross multiply
    660,746.63x = 911,752.98 × 388,754.70
  4. Step 4: Simplify right side
    660,746.63x = 354,448,256,214.01
  5. Step 5: Solve for x
    x = 354,448,256,214.01/660,746.63
  6. Step 6: Final answer
    x = 536,435.97

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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.