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Finding the Fourth Proportional to 917,672.10, 1,266,352.32 and 509,799.60

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Solution

The fourth proportional to 917,672.10, 1,266,352.32 and 509,799.60 is: 703,503.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,672.10 : 1,266,352.32 = 509,799.60 : x
  2. Step 2: Convert to fraction form
    917,672.10/1,266,352.32 = 509,799.60/x
  3. Step 3: Cross multiply
    917,672.10x = 1,266,352.32 × 509,799.60
  4. Step 4: Simplify right side
    917,672.10x = 645,585,906,195.07
  5. Step 5: Solve for x
    x = 645,585,906,195.07/917,672.10
  6. Step 6: Final answer
    x = 703,503.91

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1.5x scale

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.