Home / 915,128,137.52-1,262,877,643.50-497,440,422.80

Finding the Fourth Proportional to 915,128,137.52, 1,262,877,643.50 and 497,440,422.80

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Solution

The fourth proportional to 915,128,137.52, 1,262,877,643.50 and 497,440,422.80 is: 686,468,225.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,128,137.52 : 1,262,877,643.50 = 497,440,422.80 : x
  2. Step 2: Convert to fraction form
    915,128,137.52/1,262,877,643.50 = 497,440,422.80/x
  3. Step 3: Cross multiply
    915,128,137.52x = 1,262,877,643.50 × 497,440,422.80
  4. Step 4: Simplify right side
    915,128,137.52x = 628,206,388,927,307,648
  5. Step 5: Solve for x
    x = 628,206,388,927,307,648/915,128,137.52
  6. Step 6: Final answer
    x = 686,468,225.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.