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Finding the Fourth Proportional to 290,425.32, 435,637.08 and 77,214.60

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Solution

The fourth proportional to 290,425.32, 435,637.08 and 77,214.60 is: 115,821.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,425.32 : 435,637.08 = 77,214.60 : x
  2. Step 2: Convert to fraction form
    290,425.32/435,637.08 = 77,214.60/x
  3. Step 3: Cross multiply
    290,425.32x = 435,637.08 × 77,214.60
  4. Step 4: Simplify right side
    290,425.32x = 33,637,542,877.37
  5. Step 5: Solve for x
    x = 33,637,542,877.37/290,425.32
  6. Step 6: Final answer
    x = 115,821.66

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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.