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Finding the Fourth Proportional to 656,859.80, 985,289.70 and 648,002.45

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Solution

The fourth proportional to 656,859.80, 985,289.70 and 648,002.45 is: 972,003.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,859.80 : 985,289.70 = 648,002.45 : x
  2. Step 2: Convert to fraction form
    656,859.80/985,289.70 = 648,002.45/x
  3. Step 3: Cross multiply
    656,859.80x = 985,289.70 × 648,002.45
  4. Step 4: Simplify right side
    656,859.80x = 638,470,139,559.77
  5. Step 5: Solve for x
    x = 638,470,139,559.77/656,859.80
  6. Step 6: Final answer
    x = 972,003.68

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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.