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Finding the Fourth Proportional to 352,605.40, 528,908.10 and 212,637.40

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Solution

The fourth proportional to 352,605.40, 528,908.10 and 212,637.40 is: 318,956.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,605.40 : 528,908.10 = 212,637.40 : x
  2. Step 2: Convert to fraction form
    352,605.40/528,908.10 = 212,637.40/x
  3. Step 3: Cross multiply
    352,605.40x = 528,908.10 × 212,637.40
  4. Step 4: Simplify right side
    352,605.40x = 112,465,643,222.94
  5. Step 5: Solve for x
    x = 112,465,643,222.94/352,605.40
  6. Step 6: Final answer
    x = 318,956.10

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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.