Home / 1,390,220.40-2,085,330.60-856,009.20

Finding the Fourth Proportional to 1,390,220.40, 2,085,330.60 and 856,009.20

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Solution

The fourth proportional to 1,390,220.40, 2,085,330.60 and 856,009.20 is: 1,284,013.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,220.40 : 2,085,330.60 = 856,009.20 : x
  2. Step 2: Convert to fraction form
    1,390,220.40/2,085,330.60 = 856,009.20/x
  3. Step 3: Cross multiply
    1,390,220.40x = 2,085,330.60 × 856,009.20
  4. Step 4: Simplify right side
    1,390,220.40x = 1,785,062,178,641.52
  5. Step 5: Solve for x
    x = 1,785,062,178,641.52/1,390,220.40
  6. Step 6: Final answer
    x = 1,284,013.80

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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.