Home / 645,904.71-891,336.69-359,422.29

Finding the Fourth Proportional to 645,904.71, 891,336.69 and 359,422.29

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Solution

The fourth proportional to 645,904.71, 891,336.69 and 359,422.29 is: 495,996.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,904.71 : 891,336.69 = 359,422.29 : x
  2. Step 2: Convert to fraction form
    645,904.71/891,336.69 = 359,422.29/x
  3. Step 3: Cross multiply
    645,904.71x = 891,336.69 × 359,422.29
  4. Step 4: Simplify right side
    645,904.71x = 320,366,274,280.82
  5. Step 5: Solve for x
    x = 320,366,274,280.82/645,904.71
  6. Step 6: Final answer
    x = 495,996.19

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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.