Home / 431,569,420.35-647,354,130.53-428,546,111.55

Finding the Fourth Proportional to 431,569,420.35, 647,354,130.53 and 428,546,111.55

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Solution

The fourth proportional to 431,569,420.35, 647,354,130.53 and 428,546,111.55 is: 642,819,167.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,569,420.35 : 647,354,130.53 = 428,546,111.55 : x
  2. Step 2: Convert to fraction form
    431,569,420.35/647,354,130.53 = 428,546,111.55/x
  3. Step 3: Cross multiply
    431,569,420.35x = 647,354,130.53 × 428,546,111.55
  4. Step 4: Simplify right side
    431,569,420.35x = 277,421,095,432,319,904
  5. Step 5: Solve for x
    x = 277,421,095,432,319,904/431,569,420.35
  6. Step 6: Final answer
    x = 642,819,167.33

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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.