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Finding the Fourth Proportional to 859,812.60, 1,289,718.90 and 707,597.40

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Solution

The fourth proportional to 859,812.60, 1,289,718.90 and 707,597.40 is: 1,061,396.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,812.60 : 1,289,718.90 = 707,597.40 : x
  2. Step 2: Convert to fraction form
    859,812.60/1,289,718.90 = 707,597.40/x
  3. Step 3: Cross multiply
    859,812.60x = 1,289,718.90 × 707,597.40
  4. Step 4: Simplify right side
    859,812.60x = 912,601,740,370.86
  5. Step 5: Solve for x
    x = 912,601,740,370.86/859,812.60
  6. Step 6: Final answer
    x = 1,061,396.10

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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.