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Finding the Fourth Proportional to 611,889.12, 916,200.72 and 358,961.76

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Solution

The fourth proportional to 611,889.12, 916,200.72 and 358,961.76 is: 537,484.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,889.12 : 916,200.72 = 358,961.76 : x
  2. Step 2: Convert to fraction form
    611,889.12/916,200.72 = 358,961.76/x
  3. Step 3: Cross multiply
    611,889.12x = 916,200.72 × 358,961.76
  4. Step 4: Simplify right side
    611,889.12x = 328,881,022,964.47
  5. Step 5: Solve for x
    x = 328,881,022,964.47/611,889.12
  6. Step 6: Final answer
    x = 537,484.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.