Home / 643,264.12-887,705.06-356,784.21

Finding the Fourth Proportional to 643,264.12, 887,705.06 and 356,784.21

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Solution

The fourth proportional to 643,264.12, 887,705.06 and 356,784.21 is: 492,362.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,264.12 : 887,705.06 = 356,784.21 : x
  2. Step 2: Convert to fraction form
    643,264.12/887,705.06 = 356,784.21/x
  3. Step 3: Cross multiply
    643,264.12x = 887,705.06 × 356,784.21
  4. Step 4: Simplify right side
    643,264.12x = 316,719,148,545.10
  5. Step 5: Solve for x
    x = 316,719,148,545.10/643,264.12
  6. Step 6: Final answer
    x = 492,362.53

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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.