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Finding the Fourth Proportional to 611,616.64, 916,944.24 and 386,503.60

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Solution

The fourth proportional to 611,616.64, 916,944.24 and 386,503.60 is: 579,451.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,616.64 : 916,944.24 = 386,503.60 : x
  2. Step 2: Convert to fraction form
    611,616.64/916,944.24 = 386,503.60/x
  3. Step 3: Cross multiply
    611,616.64x = 916,944.24 × 386,503.60
  4. Step 4: Simplify right side
    611,616.64x = 354,402,249,759.26
  5. Step 5: Solve for x
    x = 354,402,249,759.26/611,616.64
  6. Step 6: Final answer
    x = 579,451.61

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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.