Home / 687,774.86-1,031,330.30-288,308.37

Finding the Fourth Proportional to 687,774.86, 1,031,330.30 and 288,308.37

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Solution

The fourth proportional to 687,774.86, 1,031,330.30 and 288,308.37 is: 432,323.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,774.86 : 1,031,330.30 = 288,308.37 : x
  2. Step 2: Convert to fraction form
    687,774.86/1,031,330.30 = 288,308.37/x
  3. Step 3: Cross multiply
    687,774.86x = 1,031,330.30 × 288,308.37
  4. Step 4: Simplify right side
    687,774.86x = 297,341,156,283.07
  5. Step 5: Solve for x
    x = 297,341,156,283.07/687,774.86
  6. Step 6: Final answer
    x = 432,323.39

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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.