Home / 915,128,120.35-1,262,877,619.85-497,440,405.65

Finding the Fourth Proportional to 915,128,120.35, 1,262,877,619.85 and 497,440,405.65

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Solution

The fourth proportional to 915,128,120.35, 1,262,877,619.85 and 497,440,405.65 is: 686,468,202.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,128,120.35 : 1,262,877,619.85 = 497,440,405.65 : x
  2. Step 2: Convert to fraction form
    915,128,120.35/1,262,877,619.85 = 497,440,405.65/x
  3. Step 3: Cross multiply
    915,128,120.35x = 1,262,877,619.85 × 497,440,405.65
  4. Step 4: Simplify right side
    915,128,120.35x = 628,206,355,504,490,368
  5. Step 5: Solve for x
    x = 628,206,355,504,490,368/915,128,120.35
  6. Step 6: Final answer
    x = 686,468,202.14

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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.