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Finding the Fourth Proportional to 385,309.20, 577,963.80 and 346,040.40

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Solution

The fourth proportional to 385,309.20, 577,963.80 and 346,040.40 is: 519,060.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,309.20 : 577,963.80 = 346,040.40 : x
  2. Step 2: Convert to fraction form
    385,309.20/577,963.80 = 346,040.40/x
  3. Step 3: Cross multiply
    385,309.20x = 577,963.80 × 346,040.40
  4. Step 4: Simplify right side
    385,309.20x = 199,998,824,537.52
  5. Step 5: Solve for x
    x = 199,998,824,537.52/385,309.20
  6. Step 6: Final answer
    x = 519,060.60

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1.5x scale

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.