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Finding the Fourth Proportional to 289,711.80, 434,567.70 and 245,534.40

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Solution

The fourth proportional to 289,711.80, 434,567.70 and 245,534.40 is: 368,301.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,711.80 : 434,567.70 = 245,534.40 : x
  2. Step 2: Convert to fraction form
    289,711.80/434,567.70 = 245,534.40/x
  3. Step 3: Cross multiply
    289,711.80x = 434,567.70 × 245,534.40
  4. Step 4: Simplify right side
    289,711.80x = 106,701,319,478.88
  5. Step 5: Solve for x
    x = 106,701,319,478.88/289,711.80
  6. Step 6: Final answer
    x = 368,301.60

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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.