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Finding the Fourth Proportional to 664,316, 916,756.08 and 396,044

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Solution

The fourth proportional to 664,316, 916,756.08 and 396,044 is: 546,540.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,316 : 916,756.08 = 396,044 : x
  2. Step 2: Convert to fraction form
    664,316/916,756.08 = 396,044/x
  3. Step 3: Cross multiply
    664,316x = 916,756.08 × 396,044
  4. Step 4: Simplify right side
    664,316x = 363,075,744,947.52
  5. Step 5: Solve for x
    x = 363,075,744,947.52/664,316
  6. Step 6: Final answer
    x = 546,540.72

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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.