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Finding the Fourth Proportional to 290,428.80, 435,643.20 and 216,700.80

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Solution

The fourth proportional to 290,428.80, 435,643.20 and 216,700.80 is: 325,051.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,428.80 : 435,643.20 = 216,700.80 : x
  2. Step 2: Convert to fraction form
    290,428.80/435,643.20 = 216,700.80/x
  3. Step 3: Cross multiply
    290,428.80x = 435,643.20 × 216,700.80
  4. Step 4: Simplify right side
    290,428.80x = 94,404,229,954.56
  5. Step 5: Solve for x
    x = 94,404,229,954.56/290,428.80
  6. Step 6: Final answer
    x = 325,051.20

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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.