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Finding the Fourth Proportional to 865,776.60, 1,298,664.90 and 708,312.60

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Solution

The fourth proportional to 865,776.60, 1,298,664.90 and 708,312.60 is: 1,062,468.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,776.60 : 1,298,664.90 = 708,312.60 : x
  2. Step 2: Convert to fraction form
    865,776.60/1,298,664.90 = 708,312.60/x
  3. Step 3: Cross multiply
    865,776.60x = 1,298,664.90 × 708,312.60
  4. Step 4: Simplify right side
    865,776.60x = 919,860,711,847.74
  5. Step 5: Solve for x
    x = 919,860,711,847.74/865,776.60
  6. Step 6: Final answer
    x = 1,062,468.90

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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.