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Finding the Fourth Proportional to 387,655.60, 581,483.40 and 254,945.20

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Solution

The fourth proportional to 387,655.60, 581,483.40 and 254,945.20 is: 382,417.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,655.60 : 581,483.40 = 254,945.20 : x
  2. Step 2: Convert to fraction form
    387,655.60/581,483.40 = 254,945.20/x
  3. Step 3: Cross multiply
    387,655.60x = 581,483.40 × 254,945.20
  4. Step 4: Simplify right side
    387,655.60x = 148,246,401,709.68
  5. Step 5: Solve for x
    x = 148,246,401,709.68/387,655.60
  6. Step 6: Final answer
    x = 382,417.80

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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.