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Finding the Fourth Proportional to 684,363.55, 944,427.81 and 378,460.51

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Solution

The fourth proportional to 684,363.55, 944,427.81 and 378,460.51 is: 522,278.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,363.55 : 944,427.81 = 378,460.51 : x
  2. Step 2: Convert to fraction form
    684,363.55/944,427.81 = 378,460.51/x
  3. Step 3: Cross multiply
    684,363.55x = 944,427.81 × 378,460.51
  4. Step 4: Simplify right side
    684,363.55x = 357,428,628,269.71
  5. Step 5: Solve for x
    x = 357,428,628,269.71/684,363.55
  6. Step 6: Final answer
    x = 522,278.88

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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.