Home / 1,390,205.70-2,085,308.55-830,333.70

Finding the Fourth Proportional to 1,390,205.70, 2,085,308.55 and 830,333.70

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Solution

The fourth proportional to 1,390,205.70, 2,085,308.55 and 830,333.70 is: 1,245,500.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,205.70 : 2,085,308.55 = 830,333.70 : x
  2. Step 2: Convert to fraction form
    1,390,205.70/2,085,308.55 = 830,333.70/x
  3. Step 3: Cross multiply
    1,390,205.70x = 2,085,308.55 × 830,333.70
  4. Step 4: Simplify right side
    1,390,205.70x = 1,731,501,963,963.14
  5. Step 5: Solve for x
    x = 1,731,501,963,963.14/1,390,205.70
  6. Step 6: Final answer
    x = 1,245,500.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.