Home / 905,545.72-1,249,592.64-497,638.78

Finding the Fourth Proportional to 905,545.72, 1,249,592.64 and 497,638.78

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Solution

The fourth proportional to 905,545.72, 1,249,592.64 and 497,638.78 is: 686,708.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,545.72 : 1,249,592.64 = 497,638.78 : x
  2. Step 2: Convert to fraction form
    905,545.72/1,249,592.64 = 497,638.78/x
  3. Step 3: Cross multiply
    905,545.72x = 1,249,592.64 × 497,638.78
  4. Step 4: Simplify right side
    905,545.72x = 621,845,756,866.58
  5. Step 5: Solve for x
    x = 621,845,756,866.58/905,545.72
  6. Step 6: Final answer
    x = 686,708.29

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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.