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Finding the Fourth Proportional to 917,000.80, 1,372,390.80 and 805,026.40

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Solution

The fourth proportional to 917,000.80, 1,372,390.80 and 805,026.40 is: 1,204,809.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,000.80 : 1,372,390.80 = 805,026.40 : x
  2. Step 2: Convert to fraction form
    917,000.80/1,372,390.80 = 805,026.40/x
  3. Step 3: Cross multiply
    917,000.80x = 1,372,390.80 × 805,026.40
  4. Step 4: Simplify right side
    917,000.80x = 1,104,810,825,117.12
  5. Step 5: Solve for x
    x = 1,104,810,825,117.12/917,000.80
  6. Step 6: Final answer
    x = 1,204,809.01

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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.