Home / 689,931.05-952,103.40-388,125.05

Finding the Fourth Proportional to 689,931.05, 952,103.40 and 388,125.05

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Solution

The fourth proportional to 689,931.05, 952,103.40 and 388,125.05 is: 535,611.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,931.05 : 952,103.40 = 388,125.05 : x
  2. Step 2: Convert to fraction form
    689,931.05/952,103.40 = 388,125.05/x
  3. Step 3: Cross multiply
    689,931.05x = 952,103.40 × 388,125.05
  4. Step 4: Simplify right side
    689,931.05x = 369,535,179,730.17
  5. Step 5: Solve for x
    x = 369,535,179,730.17/689,931.05
  6. Step 6: Final answer
    x = 535,611.75

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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.