Home / 855,403.79-1,180,415.16-487,895.45

Finding the Fourth Proportional to 855,403.79, 1,180,415.16 and 487,895.45

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Solution

The fourth proportional to 855,403.79, 1,180,415.16 and 487,895.45 is: 673,271.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    855,403.79 : 1,180,415.16 = 487,895.45 : x
  2. Step 2: Convert to fraction form
    855,403.79/1,180,415.16 = 487,895.45/x
  3. Step 3: Cross multiply
    855,403.79x = 1,180,415.16 × 487,895.45
  4. Step 4: Simplify right side
    855,403.79x = 575,919,185,675.02
  5. Step 5: Solve for x
    x = 575,919,185,675.02/855,403.79
  6. Step 6: Final answer
    x = 673,271.73

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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.