Home / 645,467.20-890,756.18-358,987.42

Finding the Fourth Proportional to 645,467.20, 890,756.18 and 358,987.42

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Solution

The fourth proportional to 645,467.20, 890,756.18 and 358,987.42 is: 495,409.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,467.20 : 890,756.18 = 358,987.42 : x
  2. Step 2: Convert to fraction form
    645,467.20/890,756.18 = 358,987.42/x
  3. Step 3: Cross multiply
    645,467.20x = 890,756.18 × 358,987.42
  4. Step 4: Simplify right side
    645,467.20x = 319,770,262,907.26
  5. Step 5: Solve for x
    x = 319,770,262,907.26/645,467.20
  6. Step 6: Final answer
    x = 495,409.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.