Home / 662,120.28-913,824.36-390,101.22

Finding the Fourth Proportional to 662,120.28, 913,824.36 and 390,101.22

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Solution

The fourth proportional to 662,120.28, 913,824.36 and 390,101.22 is: 538,397.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,120.28 : 913,824.36 = 390,101.22 : x
  2. Step 2: Convert to fraction form
    662,120.28/913,824.36 = 390,101.22/x
  3. Step 3: Cross multiply
    662,120.28x = 913,824.36 × 390,101.22
  4. Step 4: Simplify right side
    662,120.28x = 356,483,997,701.72
  5. Step 5: Solve for x
    x = 356,483,997,701.72/662,120.28
  6. Step 6: Final answer
    x = 538,397.64

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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.