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Finding the Fourth Proportional to 352,607.40, 528,911.10 and 212,639.40

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Solution

The fourth proportional to 352,607.40, 528,911.10 and 212,639.40 is: 318,959.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,607.40 : 528,911.10 = 212,639.40 : x
  2. Step 2: Convert to fraction form
    352,607.40/528,911.10 = 212,639.40/x
  3. Step 3: Cross multiply
    352,607.40x = 528,911.10 × 212,639.40
  4. Step 4: Simplify right side
    352,607.40x = 112,467,338,957.34
  5. Step 5: Solve for x
    x = 112,467,338,957.34/352,607.40
  6. Step 6: Final answer
    x = 318,959.10

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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.