Home / 638,916.40-957,208.20-519,943.60

Finding the Fourth Proportional to 638,916.40, 957,208.20 and 519,943.60

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Solution

The fourth proportional to 638,916.40, 957,208.20 and 519,943.60 is: 778,966.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,916.40 : 957,208.20 = 519,943.60 : x
  2. Step 2: Convert to fraction form
    638,916.40/957,208.20 = 519,943.60/x
  3. Step 3: Cross multiply
    638,916.40x = 957,208.20 × 519,943.60
  4. Step 4: Simplify right side
    638,916.40x = 497,694,277,457.52
  5. Step 5: Solve for x
    x = 497,694,277,457.52/638,916.40
  6. Step 6: Final answer
    x = 778,966.20

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1.5x scale

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.