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Finding the Fourth Proportional to 907,339.80, 1,361,009.70 and 402,142.80

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Solution

The fourth proportional to 907,339.80, 1,361,009.70 and 402,142.80 is: 603,214.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    907,339.80 : 1,361,009.70 = 402,142.80 : x
  2. Step 2: Convert to fraction form
    907,339.80/1,361,009.70 = 402,142.80/x
  3. Step 3: Cross multiply
    907,339.80x = 1,361,009.70 × 402,142.80
  4. Step 4: Simplify right side
    907,339.80x = 547,320,251,585.16
  5. Step 5: Solve for x
    x = 547,320,251,585.16/907,339.80
  6. Step 6: Final answer
    x = 603,214.20

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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.