Home / 392,920,160-589,789,034.40-289,406,248.12

Finding the Fourth Proportional to 392,920,160, 589,789,034.40 and 289,406,248.12

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Solution

The fourth proportional to 392,920,160, 589,789,034.40 and 289,406,248.12 is: 434,410,470.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,920,160 : 589,789,034.40 = 289,406,248.12 : x
  2. Step 2: Convert to fraction form
    392,920,160/589,789,034.40 = 289,406,248.12/x
  3. Step 3: Cross multiply
    392,920,160x = 589,789,034.40 × 289,406,248.12
  4. Step 4: Simplify right side
    392,920,160x = 170,688,631,628,021,600
  5. Step 5: Solve for x
    x = 170,688,631,628,021,600/392,920,160
  6. Step 6: Final answer
    x = 434,410,470.64

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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.