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Finding the Fourth Proportional to 553,748.55, 764,189.01 and 312,017.82

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Solution

The fourth proportional to 553,748.55, 764,189.01 and 312,017.82 is: 430,593.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,748.55 : 764,189.01 = 312,017.82 : x
  2. Step 2: Convert to fraction form
    553,748.55/764,189.01 = 312,017.82/x
  3. Step 3: Cross multiply
    553,748.55x = 764,189.01 × 312,017.82
  4. Step 4: Simplify right side
    553,748.55x = 238,440,588,968.16
  5. Step 5: Solve for x
    x = 238,440,588,968.16/553,748.55
  6. Step 6: Final answer
    x = 430,593.61

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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.