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Finding the Fourth Proportional to 409,397.76, 565,090.56 and 258,595.20

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Solution

The fourth proportional to 409,397.76, 565,090.56 and 258,595.20 is: 356,938.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,397.76 : 565,090.56 = 258,595.20 : x
  2. Step 2: Convert to fraction form
    409,397.76/565,090.56 = 258,595.20/x
  3. Step 3: Cross multiply
    409,397.76x = 565,090.56 × 258,595.20
  4. Step 4: Simplify right side
    409,397.76x = 146,129,706,381.31
  5. Step 5: Solve for x
    x = 146,129,706,381.31/409,397.76
  6. Step 6: Final answer
    x = 356,938.22

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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.