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Finding the Fourth Proportional to 865,792.60, 1,298,688.90 and 708,328.60

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Solution

The fourth proportional to 865,792.60, 1,298,688.90 and 708,328.60 is: 1,062,492.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,792.60 : 1,298,688.90 = 708,328.60 : x
  2. Step 2: Convert to fraction form
    865,792.60/1,298,688.90 = 708,328.60/x
  3. Step 3: Cross multiply
    865,792.60x = 1,298,688.90 × 708,328.60
  4. Step 4: Simplify right side
    865,792.60x = 919,898,490,372.54
  5. Step 5: Solve for x
    x = 919,898,490,372.54/865,792.60
  6. Step 6: Final answer
    x = 1,062,492.90

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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.