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Finding the Fourth Proportional to 917,008.40, 1,372,888.20 and 812,032.40

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Solution

The fourth proportional to 917,008.40, 1,372,888.20 and 812,032.40 is: 1,215,724.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,008.40 : 1,372,888.20 = 812,032.40 : x
  2. Step 2: Convert to fraction form
    917,008.40/1,372,888.20 = 812,032.40/x
  3. Step 3: Cross multiply
    917,008.40x = 1,372,888.20 × 812,032.40
  4. Step 4: Simplify right side
    917,008.40x = 1,114,829,699,977.68
  5. Step 5: Solve for x
    x = 1,114,829,699,977.68/917,008.40
  6. Step 6: Final answer
    x = 1,215,724.63

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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.