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Finding the Fourth Proportional to 553,997.49, 764,505.77 and 312,275.46

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Solution

The fourth proportional to 553,997.49, 764,505.77 and 312,275.46 is: 430,934.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,997.49 : 764,505.77 = 312,275.46 : x
  2. Step 2: Convert to fraction form
    553,997.49/764,505.77 = 312,275.46/x
  3. Step 3: Cross multiply
    553,997.49x = 764,505.77 × 312,275.46
  4. Step 4: Simplify right side
    553,997.49x = 238,736,390,999.40
  5. Step 5: Solve for x
    x = 238,736,390,999.40/553,997.49
  6. Step 6: Final answer
    x = 430,934.07

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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.