Home / 687,890.80-1,031,490.60-313,490.80

Finding the Fourth Proportional to 687,890.80, 1,031,490.60 and 313,490.80

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Solution

The fourth proportional to 687,890.80, 1,031,490.60 and 313,490.80 is: 470,078.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,890.80 : 1,031,490.60 = 313,490.80 : x
  2. Step 2: Convert to fraction form
    687,890.80/1,031,490.60 = 313,490.80/x
  3. Step 3: Cross multiply
    687,890.80x = 1,031,490.60 × 313,490.80
  4. Step 4: Simplify right side
    687,890.80x = 323,362,813,386.48
  5. Step 5: Solve for x
    x = 323,362,813,386.48/687,890.80
  6. Step 6: Final answer
    x = 470,078.70

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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.