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Finding the Fourth Proportional to 840,402.60, 1,258,271.10 and 817,074.60

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Solution

The fourth proportional to 840,402.60, 1,258,271.10 and 817,074.60 is: 1,223,343.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,402.60 : 1,258,271.10 = 817,074.60 : x
  2. Step 2: Convert to fraction form
    840,402.60/1,258,271.10 = 817,074.60/x
  3. Step 3: Cross multiply
    840,402.60x = 1,258,271.10 × 817,074.60
  4. Step 4: Simplify right side
    840,402.60x = 1,028,101,355,724.06
  5. Step 5: Solve for x
    x = 1,028,101,355,724.06/840,402.60
  6. Step 6: Final answer
    x = 1,223,343.85

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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.