Home / 426,547,778.20-639,821,667.30-392,955,458.20

Finding the Fourth Proportional to 426,547,778.20, 639,821,667.30 and 392,955,458.20

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Solution

The fourth proportional to 426,547,778.20, 639,821,667.30 and 392,955,458.20 is: 589,433,187.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,547,778.20 : 639,821,667.30 = 392,955,458.20 : x
  2. Step 2: Convert to fraction form
    426,547,778.20/639,821,667.30 = 392,955,458.20/x
  3. Step 3: Cross multiply
    426,547,778.20x = 639,821,667.30 × 392,955,458.20
  4. Step 4: Simplify right side
    426,547,778.20x = 251,421,416,440,159,424
  5. Step 5: Solve for x
    x = 251,421,416,440,159,424/426,547,778.20
  6. Step 6: Final answer
    x = 589,433,187.30

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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.