Home / 639,399.60-881,829.72-384,703.20

Finding the Fourth Proportional to 639,399.60, 881,829.72 and 384,703.20

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Solution

The fourth proportional to 639,399.60, 881,829.72 and 384,703.20 is: 530,564.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,399.60 : 881,829.72 = 384,703.20 : x
  2. Step 2: Convert to fraction form
    639,399.60/881,829.72 = 384,703.20/x
  3. Step 3: Cross multiply
    639,399.60x = 881,829.72 × 384,703.20
  4. Step 4: Simplify right side
    639,399.60x = 339,242,715,139.10
  5. Step 5: Solve for x
    x = 339,242,715,139.10/639,399.60
  6. Step 6: Final answer
    x = 530,564.48

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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.