Home / 687,854.40-1,031,927.40-208,042.80

Finding the Fourth Proportional to 687,854.40, 1,031,927.40 and 208,042.80

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Solution

The fourth proportional to 687,854.40, 1,031,927.40 and 208,042.80 is: 312,108.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,854.40 : 1,031,927.40 = 208,042.80 : x
  2. Step 2: Convert to fraction form
    687,854.40/1,031,927.40 = 208,042.80/x
  3. Step 3: Cross multiply
    687,854.40x = 1,031,927.40 × 208,042.80
  4. Step 4: Simplify right side
    687,854.40x = 214,685,065,692.72
  5. Step 5: Solve for x
    x = 214,685,065,692.72/687,854.40
  6. Step 6: Final answer
    x = 312,108.30

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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.