Home / 431,569,386.60-647,354,079.90-428,546,077.80

Finding the Fourth Proportional to 431,569,386.60, 647,354,079.90 and 428,546,077.80

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Solution

The fourth proportional to 431,569,386.60, 647,354,079.90 and 428,546,077.80 is: 642,819,116.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,569,386.60 : 647,354,079.90 = 428,546,077.80 : x
  2. Step 2: Convert to fraction form
    431,569,386.60/647,354,079.90 = 428,546,077.80/x
  3. Step 3: Cross multiply
    431,569,386.60x = 647,354,079.90 × 428,546,077.80
  4. Step 4: Simplify right side
    431,569,386.60x = 277,421,051,888,972,800
  5. Step 5: Solve for x
    x = 277,421,051,888,972,800/431,569,386.60
  6. Step 6: Final answer
    x = 642,819,116.70

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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.