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Finding the Fourth Proportional to 648,143.20, 972,214.80 and 608,744.80

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Solution

The fourth proportional to 648,143.20, 972,214.80 and 608,744.80 is: 913,117.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,143.20 : 972,214.80 = 608,744.80 : x
  2. Step 2: Convert to fraction form
    648,143.20/972,214.80 = 608,744.80/x
  3. Step 3: Cross multiply
    648,143.20x = 972,214.80 × 608,744.80
  4. Step 4: Simplify right side
    648,143.20x = 591,830,703,983.04
  5. Step 5: Solve for x
    x = 591,830,703,983.04/648,143.20
  6. Step 6: Final answer
    x = 913,117.20

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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.