Home / 905,205.11-1,249,183.82-497,307.74

Finding the Fourth Proportional to 905,205.11, 1,249,183.82 and 497,307.74

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Solution

The fourth proportional to 905,205.11, 1,249,183.82 and 497,307.74 is: 686,285.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,205.11 : 1,249,183.82 = 497,307.74 : x
  2. Step 2: Convert to fraction form
    905,205.11/1,249,183.82 = 497,307.74/x
  3. Step 3: Cross multiply
    905,205.11x = 1,249,183.82 × 497,307.74
  4. Step 4: Simplify right side
    905,205.11x = 621,228,777,366.12
  5. Step 5: Solve for x
    x = 621,228,777,366.12/905,205.11
  6. Step 6: Final answer
    x = 686,285.10

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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.