Home / 638,921.40-957,215.70-519,948.60

Finding the Fourth Proportional to 638,921.40, 957,215.70 and 519,948.60

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Solution

The fourth proportional to 638,921.40, 957,215.70 and 519,948.60 is: 778,973.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,921.40 : 957,215.70 = 519,948.60 : x
  2. Step 2: Convert to fraction form
    638,921.40/957,215.70 = 519,948.60/x
  3. Step 3: Cross multiply
    638,921.40x = 957,215.70 × 519,948.60
  4. Step 4: Simplify right side
    638,921.40x = 497,702,963,113.02
  5. Step 5: Solve for x
    x = 497,702,963,113.02/638,921.40
  6. Step 6: Final answer
    x = 778,973.69

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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.