Home / 426,547,777.20-639,821,665.80-392,955,457.20

Finding the Fourth Proportional to 426,547,777.20, 639,821,665.80 and 392,955,457.20

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Solution

The fourth proportional to 426,547,777.20, 639,821,665.80 and 392,955,457.20 is: 589,433,185.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,547,777.20 : 639,821,665.80 = 392,955,457.20 : x
  2. Step 2: Convert to fraction form
    426,547,777.20/639,821,665.80 = 392,955,457.20/x
  3. Step 3: Cross multiply
    426,547,777.20x = 639,821,665.80 × 392,955,457.20
  4. Step 4: Simplify right side
    426,547,777.20x = 251,421,415,210,904,576
  5. Step 5: Solve for x
    x = 251,421,415,210,904,576/426,547,777.20
  6. Step 6: Final answer
    x = 589,433,185.80

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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.