Home / 520,014,819.40-780,221,294.70-511,853,129.80

Finding the Fourth Proportional to 520,014,819.40, 780,221,294.70 and 511,853,129.80

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Solution

The fourth proportional to 520,014,819.40, 780,221,294.70 and 511,853,129.80 is: 767,975,635.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,014,819.40 : 780,221,294.70 = 511,853,129.80 : x
  2. Step 2: Convert to fraction form
    520,014,819.40/780,221,294.70 = 511,853,129.80/x
  3. Step 3: Cross multiply
    520,014,819.40x = 780,221,294.70 × 511,853,129.80
  4. Step 4: Simplify right side
    520,014,819.40x = 399,358,711,628,803,200
  5. Step 5: Solve for x
    x = 399,358,711,628,803,200/520,014,819.40
  6. Step 6: Final answer
    x = 767,975,635.94

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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.