Home / 1,390,646.31-2,086,294.77-431,051.67

Finding the Fourth Proportional to 1,390,646.31, 2,086,294.77 and 431,051.67

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Solution

The fourth proportional to 1,390,646.31, 2,086,294.77 and 431,051.67 is: 646,678.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,646.31 : 2,086,294.77 = 431,051.67 : x
  2. Step 2: Convert to fraction form
    1,390,646.31/2,086,294.77 = 431,051.67/x
  3. Step 3: Cross multiply
    1,390,646.31x = 2,086,294.77 × 431,051.67
  4. Step 4: Simplify right side
    1,390,646.31x = 899,300,844,720.77
  5. Step 5: Solve for x
    x = 899,300,844,720.77/1,390,646.31
  6. Step 6: Final answer
    x = 646,678.34

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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.