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Finding the Fourth Proportional to 405,124.40, 607,686.60 and 124,605.20

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Solution

The fourth proportional to 405,124.40, 607,686.60 and 124,605.20 is: 186,907.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,124.40 : 607,686.60 = 124,605.20 : x
  2. Step 2: Convert to fraction form
    405,124.40/607,686.60 = 124,605.20/x
  3. Step 3: Cross multiply
    405,124.40x = 607,686.60 × 124,605.20
  4. Step 4: Simplify right side
    405,124.40x = 75,720,910,330.32
  5. Step 5: Solve for x
    x = 75,720,910,330.32/405,124.40
  6. Step 6: Final answer
    x = 186,907.80

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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.