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Finding the Fourth Proportional to 290,490.60, 435,411.90 and 112,938.60

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Solution

The fourth proportional to 290,490.60, 435,411.90 and 112,938.60 is: 169,281.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,490.60 : 435,411.90 = 112,938.60 : x
  2. Step 2: Convert to fraction form
    290,490.60/435,411.90 = 112,938.60/x
  3. Step 3: Cross multiply
    290,490.60x = 435,411.90 × 112,938.60
  4. Step 4: Simplify right side
    290,490.60x = 49,174,810,409.34
  5. Step 5: Solve for x
    x = 49,174,810,409.34/290,490.60
  6. Step 6: Final answer
    x = 169,281.93

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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.