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Finding the Fourth Proportional to 290,307.60, 435,461.43 and 90,645.09

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Solution

The fourth proportional to 290,307.60, 435,461.43 and 90,645.09 is: 135,967.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,307.60 : 435,461.43 = 90,645.09 : x
  2. Step 2: Convert to fraction form
    290,307.60/435,461.43 = 90,645.09/x
  3. Step 3: Cross multiply
    290,307.60x = 435,461.43 × 90,645.09
  4. Step 4: Simplify right side
    290,307.60x = 39,472,440,513.88
  5. Step 5: Solve for x
    x = 39,472,440,513.88/290,307.60
  6. Step 6: Final answer
    x = 135,967.64

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1.5x scale

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.