Home / 858,390,935.20-1,287,586,402.80-313,150,256.80

Finding the Fourth Proportional to 858,390,935.20, 1,287,586,402.80 and 313,150,256.80

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Solution

The fourth proportional to 858,390,935.20, 1,287,586,402.80 and 313,150,256.80 is: 469,725,385.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,390,935.20 : 1,287,586,402.80 = 313,150,256.80 : x
  2. Step 2: Convert to fraction form
    858,390,935.20/1,287,586,402.80 = 313,150,256.80/x
  3. Step 3: Cross multiply
    858,390,935.20x = 1,287,586,402.80 × 313,150,256.80
  4. Step 4: Simplify right side
    858,390,935.20x = 403,208,012,689,008,256
  5. Step 5: Solve for x
    x = 403,208,012,689,008,256/858,390,935.20
  6. Step 6: Final answer
    x = 469,725,385.20

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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.