Home / 1,438,678.20-1,985,250.12-921,519.72

Finding the Fourth Proportional to 1,438,678.20, 1,985,250.12 and 921,519.72

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Solution

The fourth proportional to 1,438,678.20, 1,985,250.12 and 921,519.72 is: 1,271,616.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438,678.20 : 1,985,250.12 = 921,519.72 : x
  2. Step 2: Convert to fraction form
    1,438,678.20/1,985,250.12 = 921,519.72/x
  3. Step 3: Cross multiply
    1,438,678.20x = 1,985,250.12 × 921,519.72
  4. Step 4: Simplify right side
    1,438,678.20x = 1,829,447,134,712.37
  5. Step 5: Solve for x
    x = 1,829,447,134,712.37/1,438,678.20
  6. Step 6: Final answer
    x = 1,271,616.64

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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.