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Finding the Fourth Proportional to 640,702.06, 884,187.30 and 354,240.64

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Solution

The fourth proportional to 640,702.06, 884,187.30 and 354,240.64 is: 488,862.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,702.06 : 884,187.30 = 354,240.64 : x
  2. Step 2: Convert to fraction form
    640,702.06/884,187.30 = 354,240.64/x
  3. Step 3: Cross multiply
    640,702.06x = 884,187.30 × 354,240.64
  4. Step 4: Simplify right side
    640,702.06x = 313,215,075,031.87
  5. Step 5: Solve for x
    x = 313,215,075,031.87/640,702.06
  6. Step 6: Final answer
    x = 488,862.29

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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.