Home / 430,180.80-645,386.40-383,755.20

Finding the Fourth Proportional to 430,180.80, 645,386.40 and 383,755.20

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Solution

The fourth proportional to 430,180.80, 645,386.40 and 383,755.20 is: 575,735.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,180.80 : 645,386.40 = 383,755.20 : x
  2. Step 2: Convert to fraction form
    430,180.80/645,386.40 = 383,755.20/x
  3. Step 3: Cross multiply
    430,180.80x = 645,386.40 × 383,755.20
  4. Step 4: Simplify right side
    430,180.80x = 247,670,387,009.28
  5. Step 5: Solve for x
    x = 247,670,387,009.28/430,180.80
  6. Step 6: Final answer
    x = 575,735.57

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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.