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Finding the Fourth Proportional to 860,862.60, 1,291,293.90 and 708,647.40

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Solution

The fourth proportional to 860,862.60, 1,291,293.90 and 708,647.40 is: 1,062,971.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,862.60 : 1,291,293.90 = 708,647.40 : x
  2. Step 2: Convert to fraction form
    860,862.60/1,291,293.90 = 708,647.40/x
  3. Step 3: Cross multiply
    860,862.60x = 1,291,293.90 × 708,647.40
  4. Step 4: Simplify right side
    860,862.60x = 915,072,064,870.86
  5. Step 5: Solve for x
    x = 915,072,064,870.86/860,862.60
  6. Step 6: Final answer
    x = 1,062,971.10

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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.