Home / 1,392,071.68-1,921,241.60-788,480

Finding the Fourth Proportional to 1,392,071.68, 1,921,241.60 and 788,480

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Solution

The fourth proportional to 1,392,071.68, 1,921,241.60 and 788,480 is: 1,088,205.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,071.68 : 1,921,241.60 = 788,480 : x
  2. Step 2: Convert to fraction form
    1,392,071.68/1,921,241.60 = 788,480/x
  3. Step 3: Cross multiply
    1,392,071.68x = 1,921,241.60 × 788,480
  4. Step 4: Simplify right side
    1,392,071.68x = 1,514,860,576,768
  5. Step 5: Solve for x
    x = 1,514,860,576,768/1,392,071.68
  6. Step 6: Final answer
    x = 1,088,205.87

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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.