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Finding the Fourth Proportional to 646,280.80, 969,464.40 and 219,810.40

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Solution

The fourth proportional to 646,280.80, 969,464.40 and 219,810.40 is: 329,730.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,280.80 : 969,464.40 = 219,810.40 : x
  2. Step 2: Convert to fraction form
    646,280.80/969,464.40 = 219,810.40/x
  3. Step 3: Cross multiply
    646,280.80x = 969,464.40 × 219,810.40
  4. Step 4: Simplify right side
    646,280.80x = 213,098,357,549.76
  5. Step 5: Solve for x
    x = 213,098,357,549.76/646,280.80
  6. Step 6: Final answer
    x = 329,730.29

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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.