Home / 662,021.15-913,580.65-390,100.50

Finding the Fourth Proportional to 662,021.15, 913,580.65 and 390,100.50

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Solution

The fourth proportional to 662,021.15, 913,580.65 and 390,100.50 is: 538,333.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,021.15 : 913,580.65 = 390,100.50 : x
  2. Step 2: Convert to fraction form
    662,021.15/913,580.65 = 390,100.50/x
  3. Step 3: Cross multiply
    662,021.15x = 913,580.65 × 390,100.50
  4. Step 4: Simplify right side
    662,021.15x = 356,388,267,380.07
  5. Step 5: Solve for x
    x = 356,388,267,380.07/662,021.15
  6. Step 6: Final answer
    x = 538,333.66

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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.