Home / 426,547,807.20-639,821,710.80-392,955,487.20

Finding the Fourth Proportional to 426,547,807.20, 639,821,710.80 and 392,955,487.20

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Solution

The fourth proportional to 426,547,807.20, 639,821,710.80 and 392,955,487.20 is: 589,433,230.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,547,807.20 : 639,821,710.80 = 392,955,487.20 : x
  2. Step 2: Convert to fraction form
    426,547,807.20/639,821,710.80 = 392,955,487.20/x
  3. Step 3: Cross multiply
    426,547,807.20x = 639,821,710.80 × 392,955,487.20
  4. Step 4: Simplify right side
    426,547,807.20x = 251,421,452,088,551,488
  5. Step 5: Solve for x
    x = 251,421,452,088,551,488/426,547,807.20
  6. Step 6: Final answer
    x = 589,433,230.80

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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.