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Finding the Fourth Proportional to 343,908.40, 515,862.60 and 308,916.40

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Solution

The fourth proportional to 343,908.40, 515,862.60 and 308,916.40 is: 463,374.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,908.40 : 515,862.60 = 308,916.40 : x
  2. Step 2: Convert to fraction form
    343,908.40/515,862.60 = 308,916.40/x
  3. Step 3: Cross multiply
    343,908.40x = 515,862.60 × 308,916.40
  4. Step 4: Simplify right side
    343,908.40x = 159,358,417,286.64
  5. Step 5: Solve for x
    x = 159,358,417,286.64/343,908.40
  6. Step 6: Final answer
    x = 463,374.60

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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.