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Finding the Fourth Proportional to 947,458.80, 1,421,965.80 and 916,354.80

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Solution

The fourth proportional to 947,458.80, 1,421,965.80 and 916,354.80 is: 1,375,284.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    947,458.80 : 1,421,965.80 = 916,354.80 : x
  2. Step 2: Convert to fraction form
    947,458.80/1,421,965.80 = 916,354.80/x
  3. Step 3: Cross multiply
    947,458.80x = 1,421,965.80 × 916,354.80
  4. Step 4: Simplify right side
    947,458.80x = 1,303,025,186,265.84
  5. Step 5: Solve for x
    x = 1,303,025,186,265.84/947,458.80
  6. Step 6: Final answer
    x = 1,375,284.27

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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.