Home / 905,285.76-1,249,289.37-491,819.10

Finding the Fourth Proportional to 905,285.76, 1,249,289.37 and 491,819.10

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Solution

The fourth proportional to 905,285.76, 1,249,289.37 and 491,819.10 is: 678,707.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,285.76 : 1,249,289.37 = 491,819.10 : x
  2. Step 2: Convert to fraction form
    905,285.76/1,249,289.37 = 491,819.10/x
  3. Step 3: Cross multiply
    905,285.76x = 1,249,289.37 × 491,819.10
  4. Step 4: Simplify right side
    905,285.76x = 614,424,373,592.97
  5. Step 5: Solve for x
    x = 614,424,373,592.97/905,285.76
  6. Step 6: Final answer
    x = 678,707.65

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.