Home / 1,390,712.56-1,918,964.10-810,031.24

Finding the Fourth Proportional to 1,390,712.56, 1,918,964.10 and 810,031.24

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Solution

The fourth proportional to 1,390,712.56, 1,918,964.10 and 810,031.24 is: 1,117,715.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,712.56 : 1,918,964.10 = 810,031.24 : x
  2. Step 2: Convert to fraction form
    1,390,712.56/1,918,964.10 = 810,031.24/x
  3. Step 3: Cross multiply
    1,390,712.56x = 1,918,964.10 × 810,031.24
  4. Step 4: Simplify right side
    1,390,712.56x = 1,554,420,869,438.48
  5. Step 5: Solve for x
    x = 1,554,420,869,438.48/1,390,712.56
  6. Step 6: Final answer
    x = 1,117,715.42

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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.