Home / 781,138.95-1,077,928.39-436,908.38

Finding the Fourth Proportional to 781,138.95, 1,077,928.39 and 436,908.38

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Solution

The fourth proportional to 781,138.95, 1,077,928.39 and 436,908.38 is: 602,909.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,138.95 : 1,077,928.39 = 436,908.38 : x
  2. Step 2: Convert to fraction form
    781,138.95/1,077,928.39 = 436,908.38/x
  3. Step 3: Cross multiply
    781,138.95x = 1,077,928.39 × 436,908.38
  4. Step 4: Simplify right side
    781,138.95x = 470,955,939,056.72
  5. Step 5: Solve for x
    x = 470,955,939,056.72/781,138.95
  6. Step 6: Final answer
    x = 602,909.31

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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.