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Finding the Fourth Proportional to 660,288.96, 909,158.46 and 515,678.88

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Solution

The fourth proportional to 660,288.96, 909,158.46 and 515,678.88 is: 710,043.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,288.96 : 909,158.46 = 515,678.88 : x
  2. Step 2: Convert to fraction form
    660,288.96/909,158.46 = 515,678.88/x
  3. Step 3: Cross multiply
    660,288.96x = 909,158.46 × 515,678.88
  4. Step 4: Simplify right side
    660,288.96x = 468,833,816,395.33
  5. Step 5: Solve for x
    x = 468,833,816,395.33/660,288.96
  6. Step 6: Final answer
    x = 710,043.40

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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.