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Finding the Fourth Proportional to 553,779.36, 764,215.47 and 299,130.57

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Solution

The fourth proportional to 553,779.36, 764,215.47 and 299,130.57 is: 412,800.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,779.36 : 764,215.47 = 299,130.57 : x
  2. Step 2: Convert to fraction form
    553,779.36/764,215.47 = 299,130.57/x
  3. Step 3: Cross multiply
    553,779.36x = 764,215.47 × 299,130.57
  4. Step 4: Simplify right side
    553,779.36x = 228,600,209,143.92
  5. Step 5: Solve for x
    x = 228,600,209,143.92/553,779.36
  6. Step 6: Final answer
    x = 412,800.16

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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.