Home / 553,835.53-764,305.86-312,125.55

Finding the Fourth Proportional to 553,835.53, 764,305.86 and 312,125.55

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Solution

The fourth proportional to 553,835.53, 764,305.86 and 312,125.55 is: 430,740.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,835.53 : 764,305.86 = 312,125.55 : x
  2. Step 2: Convert to fraction form
    553,835.53/764,305.86 = 312,125.55/x
  3. Step 3: Cross multiply
    553,835.53x = 764,305.86 × 312,125.55
  4. Step 4: Simplify right side
    553,835.53x = 238,559,387,768.56
  5. Step 5: Solve for x
    x = 238,559,387,768.56/553,835.53
  6. Step 6: Final answer
    x = 430,740.49

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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.