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Finding the Fourth Proportional to 840,574.80, 1,252,709.10 and 813,676.32

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Solution

The fourth proportional to 840,574.80, 1,252,709.10 and 813,676.32 is: 1,212,622.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,574.80 : 1,252,709.10 = 813,676.32 : x
  2. Step 2: Convert to fraction form
    840,574.80/1,252,709.10 = 813,676.32/x
  3. Step 3: Cross multiply
    840,574.80x = 1,252,709.10 × 813,676.32
  4. Step 4: Simplify right side
    840,574.80x = 1,019,299,730,518.51
  5. Step 5: Solve for x
    x = 1,019,299,730,518.51/840,574.80
  6. Step 6: Final answer
    x = 1,212,622.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.