Home / 917,939,861.40-1,266,720,052.86-500,243,178.36

Finding the Fourth Proportional to 917,939,861.40, 1,266,720,052.86 and 500,243,178.36

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Solution

The fourth proportional to 917,939,861.40, 1,266,720,052.86 and 500,243,178.36 is: 690,315,446.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,939,861.40 : 1,266,720,052.86 = 500,243,178.36 : x
  2. Step 2: Convert to fraction form
    917,939,861.40/1,266,720,052.86 = 500,243,178.36/x
  3. Step 3: Cross multiply
    917,939,861.40x = 1,266,720,052.86 × 500,243,178.36
  4. Step 4: Simplify right side
    917,939,861.40x = 633,668,065,335,033,600
  5. Step 5: Solve for x
    x = 633,668,065,335,033,600/917,939,861.40
  6. Step 6: Final answer
    x = 690,315,446.56

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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.