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Finding the Fourth Proportional to 660,702.61, 911,612.77 and 388,782.37

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Solution

The fourth proportional to 660,702.61, 911,612.77 and 388,782.37 is: 536,427.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,702.61 : 911,612.77 = 388,782.37 : x
  2. Step 2: Convert to fraction form
    660,702.61/911,612.77 = 388,782.37/x
  3. Step 3: Cross multiply
    660,702.61x = 911,612.77 × 388,782.37
  4. Step 4: Simplify right side
    660,702.61x = 354,418,973,242.87
  5. Step 5: Solve for x
    x = 354,418,973,242.87/660,702.61
  6. Step 6: Final answer
    x = 536,427.38

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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.