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Finding the Fourth Proportional to 916,875.40, 1,375,313.10 and 838,078.60

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Solution

The fourth proportional to 916,875.40, 1,375,313.10 and 838,078.60 is: 1,257,117.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,875.40 : 1,375,313.10 = 838,078.60 : x
  2. Step 2: Convert to fraction form
    916,875.40/1,375,313.10 = 838,078.60/x
  3. Step 3: Cross multiply
    916,875.40x = 1,375,313.10 × 838,078.60
  4. Step 4: Simplify right side
    916,875.40x = 1,152,620,477,409.66
  5. Step 5: Solve for x
    x = 1,152,620,477,409.66/916,875.40
  6. Step 6: Final answer
    x = 1,257,117.90

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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.