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Finding the Fourth Proportional to 840,000.80, 1,259,855.40 and 307,247.60

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Solution

The fourth proportional to 840,000.80, 1,259,855.40 and 307,247.60 is: 460,818.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,000.80 : 1,259,855.40 = 307,247.60 : x
  2. Step 2: Convert to fraction form
    840,000.80/1,259,855.40 = 307,247.60/x
  3. Step 3: Cross multiply
    840,000.80x = 1,259,855.40 × 307,247.60
  4. Step 4: Simplify right side
    840,000.80x = 387,087,547,997.04
  5. Step 5: Solve for x
    x = 387,087,547,997.04/840,000.80
  6. Step 6: Final answer
    x = 460,818.07

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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.