Home / 499,306.90-688,849.90-317,986.38

Finding the Fourth Proportional to 499,306.90, 688,849.90 and 317,986.38

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Solution

The fourth proportional to 499,306.90, 688,849.90 and 317,986.38 is: 438,697.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,306.90 : 688,849.90 = 317,986.38 : x
  2. Step 2: Convert to fraction form
    499,306.90/688,849.90 = 317,986.38/x
  3. Step 3: Cross multiply
    499,306.90x = 688,849.90 × 317,986.38
  4. Step 4: Simplify right side
    499,306.90x = 219,044,886,064.36
  5. Step 5: Solve for x
    x = 219,044,886,064.36/499,306.90
  6. Step 6: Final answer
    x = 438,697.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.