Home / 656,021,572.72-984,280,189.80-393,888,901.52

Finding the Fourth Proportional to 656,021,572.72, 984,280,189.80 and 393,888,901.52

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Solution

The fourth proportional to 656,021,572.72, 984,280,189.80 and 393,888,901.52 is: 590,982,154.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,021,572.72 : 984,280,189.80 = 393,888,901.52 : x
  2. Step 2: Convert to fraction form
    656,021,572.72/984,280,189.80 = 393,888,901.52/x
  3. Step 3: Cross multiply
    656,021,572.72x = 984,280,189.80 × 393,888,901.52
  4. Step 4: Simplify right side
    656,021,572.72x = 387,697,042,748,219,072
  5. Step 5: Solve for x
    x = 387,697,042,748,219,072/656,021,572.72
  6. Step 6: Final answer
    x = 590,982,154.96

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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.