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Finding the Fourth Proportional to 912,955.92, 1,369,658 and 643,610.40

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Solution

The fourth proportional to 912,955.92, 1,369,658 and 643,610.40 is: 965,573.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,955.92 : 1,369,658 = 643,610.40 : x
  2. Step 2: Convert to fraction form
    912,955.92/1,369,658 = 643,610.40/x
  3. Step 3: Cross multiply
    912,955.92x = 1,369,658 × 643,610.40
  4. Step 4: Simplify right side
    912,955.92x = 881,526,133,243.20
  5. Step 5: Solve for x
    x = 881,526,133,243.20/912,955.92
  6. Step 6: Final answer
    x = 965,573.60

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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.