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Finding the Fourth Proportional to 289,807.80, 434,711.70 and 249,718.20

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Solution

The fourth proportional to 289,807.80, 434,711.70 and 249,718.20 is: 374,577.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,807.80 : 434,711.70 = 249,718.20 : x
  2. Step 2: Convert to fraction form
    289,807.80/434,711.70 = 249,718.20/x
  3. Step 3: Cross multiply
    289,807.80x = 434,711.70 × 249,718.20
  4. Step 4: Simplify right side
    289,807.80x = 108,555,423,242.94
  5. Step 5: Solve for x
    x = 108,555,423,242.94/289,807.80
  6. Step 6: Final answer
    x = 374,577.30

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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.