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Finding the Fourth Proportional to 911,291.47, 1,256,640.29 and 782,655.88

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Solution

The fourth proportional to 911,291.47, 1,256,640.29 and 782,655.88 is: 1,079,256.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,291.47 : 1,256,640.29 = 782,655.88 : x
  2. Step 2: Convert to fraction form
    911,291.47/1,256,640.29 = 782,655.88/x
  3. Step 3: Cross multiply
    911,291.47x = 1,256,640.29 × 782,655.88
  4. Step 4: Simplify right side
    911,291.47x = 983,516,908,048.47
  5. Step 5: Solve for x
    x = 983,516,908,048.47/911,291.47
  6. Step 6: Final answer
    x = 1,079,256.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.