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Finding the Fourth Proportional to 561,572.64, 774,988.08 and 306,918.24

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Solution

The fourth proportional to 561,572.64, 774,988.08 and 306,918.24 is: 423,556.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,572.64 : 774,988.08 = 306,918.24 : x
  2. Step 2: Convert to fraction form
    561,572.64/774,988.08 = 306,918.24/x
  3. Step 3: Cross multiply
    561,572.64x = 774,988.08 × 306,918.24
  4. Step 4: Simplify right side
    561,572.64x = 237,857,977,534.58
  5. Step 5: Solve for x
    x = 237,857,977,534.58/561,572.64
  6. Step 6: Final answer
    x = 423,556.92

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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.