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Finding the Fourth Proportional to 689,876.30, 952,027.88 and 388,070.30

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Solution

The fourth proportional to 689,876.30, 952,027.88 and 388,070.30 is: 535,536.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,876.30 : 952,027.88 = 388,070.30 : x
  2. Step 2: Convert to fraction form
    689,876.30/952,027.88 = 388,070.30/x
  3. Step 3: Cross multiply
    689,876.30x = 952,027.88 × 388,070.30
  4. Step 4: Simplify right side
    689,876.30x = 369,453,744,999.96
  5. Step 5: Solve for x
    x = 369,453,744,999.96/689,876.30
  6. Step 6: Final answer
    x = 535,536.22

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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.