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Finding the Fourth Proportional to 689,855.60, 952,114.56 and 403,320.80

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Solution

The fourth proportional to 689,855.60, 952,114.56 and 403,320.80 is: 556,649.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,855.60 : 952,114.56 = 403,320.80 : x
  2. Step 2: Convert to fraction form
    689,855.60/952,114.56 = 403,320.80/x
  3. Step 3: Cross multiply
    689,855.60x = 952,114.56 × 403,320.80
  4. Step 4: Simplify right side
    689,855.60x = 384,007,606,030.85
  5. Step 5: Solve for x
    x = 384,007,606,030.85/689,855.60
  6. Step 6: Final answer
    x = 556,649.26

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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.