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Finding the Fourth Proportional to 421,673.49, 632,594.88 and 155,435.40

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Solution

The fourth proportional to 421,673.49, 632,594.88 and 155,435.40 is: 233,184.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,673.49 : 632,594.88 = 155,435.40 : x
  2. Step 2: Convert to fraction form
    421,673.49/632,594.88 = 155,435.40/x
  3. Step 3: Cross multiply
    421,673.49x = 632,594.88 × 155,435.40
  4. Step 4: Simplify right side
    421,673.49x = 98,327,638,210.75
  5. Step 5: Solve for x
    x = 98,327,638,210.75/421,673.49
  6. Step 6: Final answer
    x = 233,184.30

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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.