Home / 431,569,386.10-647,354,079.15-428,546,077.30

Finding the Fourth Proportional to 431,569,386.10, 647,354,079.15 and 428,546,077.30

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Solution

The fourth proportional to 431,569,386.10, 647,354,079.15 and 428,546,077.30 is: 642,819,115.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,569,386.10 : 647,354,079.15 = 428,546,077.30 : x
  2. Step 2: Convert to fraction form
    431,569,386.10/647,354,079.15 = 428,546,077.30/x
  3. Step 3: Cross multiply
    431,569,386.10x = 647,354,079.15 × 428,546,077.30
  4. Step 4: Simplify right side
    431,569,386.10x = 277,421,051,243,886,208
  5. Step 5: Solve for x
    x = 277,421,051,243,886,208/431,569,386.10
  6. Step 6: Final answer
    x = 642,819,115.95

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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.