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Finding the Fourth Proportional to 330,639.60, 495,959.40 and 172,916.40

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Solution

The fourth proportional to 330,639.60, 495,959.40 and 172,916.40 is: 259,374.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,639.60 : 495,959.40 = 172,916.40 : x
  2. Step 2: Convert to fraction form
    330,639.60/495,959.40 = 172,916.40/x
  3. Step 3: Cross multiply
    330,639.60x = 495,959.40 × 172,916.40
  4. Step 4: Simplify right side
    330,639.60x = 85,759,513,994.16
  5. Step 5: Solve for x
    x = 85,759,513,994.16/330,639.60
  6. Step 6: Final answer
    x = 259,374.60

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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.