Home / 645,467.72-890,777.00-358,981.66

Finding the Fourth Proportional to 645,467.72, 890,777.00 and 358,981.66

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Solution

The fourth proportional to 645,467.72, 890,777.00 and 358,981.66 is: 495,412.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,467.72 : 890,777.00 = 358,981.66 : x
  2. Step 2: Convert to fraction form
    645,467.72/890,777.00 = 358,981.66/x
  3. Step 3: Cross multiply
    645,467.72x = 890,777.00 × 358,981.66
  4. Step 4: Simplify right side
    645,467.72x = 319,772,604,820.33
  5. Step 5: Solve for x
    x = 319,772,604,820.33/645,467.72
  6. Step 6: Final answer
    x = 495,412.23

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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.