Home / 1,285,916.73-1,930,031.48-687,389.50

Finding the Fourth Proportional to 1,285,916.73, 1,930,031.48 and 687,389.50

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Solution

The fourth proportional to 1,285,916.73, 1,930,031.48 and 687,389.50 is: 1,031,702.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285,916.73 : 1,930,031.48 = 687,389.50 : x
  2. Step 2: Convert to fraction form
    1,285,916.73/1,930,031.48 = 687,389.50/x
  3. Step 3: Cross multiply
    1,285,916.73x = 1,930,031.48 × 687,389.50
  4. Step 4: Simplify right side
    1,285,916.73x = 1,326,683,374,021.46
  5. Step 5: Solve for x
    x = 1,326,683,374,021.46/1,285,916.73
  6. Step 6: Final answer
    x = 1,031,702.40

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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.