Home / 426,133.08-638,412.30-215,267.40

Finding the Fourth Proportional to 426,133.08, 638,412.30 and 215,267.40

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Solution

The fourth proportional to 426,133.08, 638,412.30 and 215,267.40 is: 322,503.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,133.08 : 638,412.30 = 215,267.40 : x
  2. Step 2: Convert to fraction form
    426,133.08/638,412.30 = 215,267.40/x
  3. Step 3: Cross multiply
    426,133.08x = 638,412.30 × 215,267.40
  4. Step 4: Simplify right side
    426,133.08x = 137,429,355,949.02
  5. Step 5: Solve for x
    x = 137,429,355,949.02/426,133.08
  6. Step 6: Final answer
    x = 322,503.37

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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.