Home / 919,989.72-1,379,547.54-320,878.08

Finding the Fourth Proportional to 919,989.72, 1,379,547.54 and 320,878.08

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Solution

The fourth proportional to 919,989.72, 1,379,547.54 and 320,878.08 is: 481,164.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,989.72 : 1,379,547.54 = 320,878.08 : x
  2. Step 2: Convert to fraction form
    919,989.72/1,379,547.54 = 320,878.08/x
  3. Step 3: Cross multiply
    919,989.72x = 1,379,547.54 × 320,878.08
  4. Step 4: Simplify right side
    919,989.72x = 442,666,565,903.92
  5. Step 5: Solve for x
    x = 442,666,565,903.92/919,989.72
  6. Step 6: Final answer
    x = 481,164.69

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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.