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Finding the Fourth Proportional to 290,877.60, 436,316.40 and 91,215.42

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Solution

The fourth proportional to 290,877.60, 436,316.40 and 91,215.42 is: 136,823.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,877.60 : 436,316.40 = 91,215.42 : x
  2. Step 2: Convert to fraction form
    290,877.60/436,316.40 = 91,215.42/x
  3. Step 3: Cross multiply
    290,877.60x = 436,316.40 × 91,215.42
  4. Step 4: Simplify right side
    290,877.60x = 39,798,783,678.89
  5. Step 5: Solve for x
    x = 39,798,783,678.89/290,877.60
  6. Step 6: Final answer
    x = 136,823.13

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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.