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Finding the Fourth Proportional to 519,948.80, 778,756.80 and 426,636.80

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Solution

The fourth proportional to 519,948.80, 778,756.80 and 426,636.80 is: 638,998.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,948.80 : 778,756.80 = 426,636.80 : x
  2. Step 2: Convert to fraction form
    519,948.80/778,756.80 = 426,636.80/x
  3. Step 3: Cross multiply
    519,948.80x = 778,756.80 × 426,636.80
  4. Step 4: Simplify right side
    519,948.80x = 332,246,309,130.24
  5. Step 5: Solve for x
    x = 332,246,309,130.24/519,948.80
  6. Step 6: Final answer
    x = 638,998.13

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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.