Home / 662,126.28-913,832.64-390,107.22

Finding the Fourth Proportional to 662,126.28, 913,832.64 and 390,107.22

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Solution

The fourth proportional to 662,126.28, 913,832.64 and 390,107.22 is: 538,405.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,126.28 : 913,832.64 = 390,107.22 : x
  2. Step 2: Convert to fraction form
    662,126.28/913,832.64 = 390,107.22/x
  3. Step 3: Cross multiply
    662,126.28x = 913,832.64 × 390,107.22
  4. Step 4: Simplify right side
    662,126.28x = 356,492,710,735.66
  5. Step 5: Solve for x
    x = 356,492,710,735.66/662,126.28
  6. Step 6: Final answer
    x = 538,405.92

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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.