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Finding the Fourth Proportional to 907,445.40, 1,361,168.10 and 817,243.80

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Solution

The fourth proportional to 907,445.40, 1,361,168.10 and 817,243.80 is: 1,225,865.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    907,445.40 : 1,361,168.10 = 817,243.80 : x
  2. Step 2: Convert to fraction form
    907,445.40/1,361,168.10 = 817,243.80/x
  3. Step 3: Cross multiply
    907,445.40x = 1,361,168.10 × 817,243.80
  4. Step 4: Simplify right side
    907,445.40x = 1,112,406,190,482.78
  5. Step 5: Solve for x
    x = 1,112,406,190,482.78/907,445.40
  6. Step 6: Final answer
    x = 1,225,865.70

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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.