Home / 687,920.58-1,031,409.86-350,307.72

Finding the Fourth Proportional to 687,920.58, 1,031,409.86 and 350,307.72

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Solution

The fourth proportional to 687,920.58, 1,031,409.86 and 350,307.72 is: 525,221.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,920.58 : 1,031,409.86 = 350,307.72 : x
  2. Step 2: Convert to fraction form
    687,920.58/1,031,409.86 = 350,307.72/x
  3. Step 3: Cross multiply
    687,920.58x = 1,031,409.86 × 350,307.72
  4. Step 4: Simplify right side
    687,920.58x = 361,310,834,690.58
  5. Step 5: Solve for x
    x = 361,310,834,690.58/687,920.58
  6. Step 6: Final answer
    x = 525,221.73

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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.