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Finding the Fourth Proportional to 553,346.10, 763,638.12 and 308,352.96

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Solution

The fourth proportional to 553,346.10, 763,638.12 and 308,352.96 is: 425,538.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,346.10 : 763,638.12 = 308,352.96 : x
  2. Step 2: Convert to fraction form
    553,346.10/763,638.12 = 308,352.96/x
  3. Step 3: Cross multiply
    553,346.10x = 763,638.12 × 308,352.96
  4. Step 4: Simplify right side
    553,346.10x = 235,470,074,670.84
  5. Step 5: Solve for x
    x = 235,470,074,670.84/553,346.10
  6. Step 6: Final answer
    x = 425,538.51

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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.