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Finding the Fourth Proportional to 610,414.80, 915,622.20 and 311,816.40

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Solution

The fourth proportional to 610,414.80, 915,622.20 and 311,816.40 is: 467,724.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,414.80 : 915,622.20 = 311,816.40 : x
  2. Step 2: Convert to fraction form
    610,414.80/915,622.20 = 311,816.40/x
  3. Step 3: Cross multiply
    610,414.80x = 915,622.20 × 311,816.40
  4. Step 4: Simplify right side
    610,414.80x = 285,506,018,164.08
  5. Step 5: Solve for x
    x = 285,506,018,164.08/610,414.80
  6. Step 6: Final answer
    x = 467,724.60

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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.