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Finding the Fourth Proportional to 662,969.40, 994,454.10 and 289,721.40

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Solution

The fourth proportional to 662,969.40, 994,454.10 and 289,721.40 is: 434,582.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,969.40 : 994,454.10 = 289,721.40 : x
  2. Step 2: Convert to fraction form
    662,969.40/994,454.10 = 289,721.40/x
  3. Step 3: Cross multiply
    662,969.40x = 994,454.10 × 289,721.40
  4. Step 4: Simplify right side
    662,969.40x = 288,114,634,087.74
  5. Step 5: Solve for x
    x = 288,114,634,087.74/662,969.40
  6. Step 6: Final answer
    x = 434,582.10

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1.5x scale

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.