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Finding the Fourth Proportional to 405,020.80, 607,531.20 and 370,903.60

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Solution

The fourth proportional to 405,020.80, 607,531.20 and 370,903.60 is: 556,355.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,020.80 : 607,531.20 = 370,903.60 : x
  2. Step 2: Convert to fraction form
    405,020.80/607,531.20 = 370,903.60/x
  3. Step 3: Cross multiply
    405,020.80x = 607,531.20 × 370,903.60
  4. Step 4: Simplify right side
    405,020.80x = 225,335,509,192.32
  5. Step 5: Solve for x
    x = 225,335,509,192.32/405,020.80
  6. Step 6: Final answer
    x = 556,355.40

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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.