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Finding the Fourth Proportional to 385,132.60, 577,698.90 and 346,425.40

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Solution

The fourth proportional to 385,132.60, 577,698.90 and 346,425.40 is: 519,638.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,132.60 : 577,698.90 = 346,425.40 : x
  2. Step 2: Convert to fraction form
    385,132.60/577,698.90 = 346,425.40/x
  3. Step 3: Cross multiply
    385,132.60x = 577,698.90 × 346,425.40
  4. Step 4: Simplify right side
    385,132.60x = 200,129,572,512.06
  5. Step 5: Solve for x
    x = 200,129,572,512.06/385,132.60
  6. Step 6: Final answer
    x = 519,638.10

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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.