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Finding the Fourth Proportional to 813,748.80, 1,219,748.40 and 308,114.40

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Solution

The fourth proportional to 813,748.80, 1,219,748.40 and 308,114.40 is: 461,840.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,748.80 : 1,219,748.40 = 308,114.40 : x
  2. Step 2: Convert to fraction form
    813,748.80/1,219,748.40 = 308,114.40/x
  3. Step 3: Cross multiply
    813,748.80x = 1,219,748.40 × 308,114.40
  4. Step 4: Simplify right side
    813,748.80x = 375,822,046,416.96
  5. Step 5: Solve for x
    x = 375,822,046,416.96/813,748.80
  6. Step 6: Final answer
    x = 461,840.37

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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.