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Finding the Fourth Proportional to 865,762.60, 1,298,643.90 and 708,298.60

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Solution

The fourth proportional to 865,762.60, 1,298,643.90 and 708,298.60 is: 1,062,447.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,762.60 : 1,298,643.90 = 708,298.60 : x
  2. Step 2: Convert to fraction form
    865,762.60/1,298,643.90 = 708,298.60/x
  3. Step 3: Cross multiply
    865,762.60x = 1,298,643.90 × 708,298.60
  4. Step 4: Simplify right side
    865,762.60x = 919,827,656,268.54
  5. Step 5: Solve for x
    x = 919,827,656,268.54/865,762.60
  6. Step 6: Final answer
    x = 1,062,447.90

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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.