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Finding the Fourth Proportional to 879,674.40, 1,319,338.80 and 288,698.40

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Solution

The fourth proportional to 879,674.40, 1,319,338.80 and 288,698.40 is: 432,990.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,674.40 : 1,319,338.80 = 288,698.40 : x
  2. Step 2: Convert to fraction form
    879,674.40/1,319,338.80 = 288,698.40/x
  3. Step 3: Cross multiply
    879,674.40x = 1,319,338.80 × 288,698.40
  4. Step 4: Simplify right side
    879,674.40x = 380,891,000,617.92
  5. Step 5: Solve for x
    x = 380,891,000,617.92/879,674.40
  6. Step 6: Final answer
    x = 432,990.89

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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.