Home / 319,531.08-442,816.92-315,021

Finding the Fourth Proportional to 319,531.08, 442,816.92 and 315,021

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Solution

The fourth proportional to 319,531.08, 442,816.92 and 315,021 is: 436,566.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,531.08 : 442,816.92 = 315,021 : x
  2. Step 2: Convert to fraction form
    319,531.08/442,816.92 = 315,021/x
  3. Step 3: Cross multiply
    319,531.08x = 442,816.92 × 315,021
  4. Step 4: Simplify right side
    319,531.08x = 139,496,628,955.32
  5. Step 5: Solve for x
    x = 139,496,628,955.32/319,531.08
  6. Step 6: Final answer
    x = 436,566.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.