Home / 579,438.40-867,991.20-402,145.60

Finding the Fourth Proportional to 579,438.40, 867,991.20 and 402,145.60

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Solution

The fourth proportional to 579,438.40, 867,991.20 and 402,145.60 is: 602,408.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,438.40 : 867,991.20 = 402,145.60 : x
  2. Step 2: Convert to fraction form
    579,438.40/867,991.20 = 402,145.60/x
  3. Step 3: Cross multiply
    579,438.40x = 867,991.20 × 402,145.60
  4. Step 4: Simplify right side
    579,438.40x = 349,058,841,918.72
  5. Step 5: Solve for x
    x = 349,058,841,918.72/579,438.40
  6. Step 6: Final answer
    x = 602,408.89

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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.