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Finding the Fourth Proportional to 405,842.40, 607,597.20 and 359,186.40

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Solution

The fourth proportional to 405,842.40, 607,597.20 and 359,186.40 is: 537,747.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,842.40 : 607,597.20 = 359,186.40 : x
  2. Step 2: Convert to fraction form
    405,842.40/607,597.20 = 359,186.40/x
  3. Step 3: Cross multiply
    405,842.40x = 607,597.20 × 359,186.40
  4. Step 4: Simplify right side
    405,842.40x = 218,240,650,918.08
  5. Step 5: Solve for x
    x = 218,240,650,918.08/405,842.40
  6. Step 6: Final answer
    x = 537,747.29

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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.