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Finding the Fourth Proportional to 353,114.60, 528,980.70 and 212,455.40

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Solution

The fourth proportional to 353,114.60, 528,980.70 and 212,455.40 is: 318,267.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,114.60 : 528,980.70 = 212,455.40 : x
  2. Step 2: Convert to fraction form
    353,114.60/528,980.70 = 212,455.40/x
  3. Step 3: Cross multiply
    353,114.60x = 528,980.70 × 212,455.40
  4. Step 4: Simplify right side
    353,114.60x = 112,384,806,210.78
  5. Step 5: Solve for x
    x = 112,384,806,210.78/353,114.60
  6. Step 6: Final answer
    x = 318,267.23

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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.