Home / 431,946,985.60-647,977,310.40-159,509,123.20

Finding the Fourth Proportional to 431,946,985.60, 647,977,310.40 and 159,509,123.20

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Solution

The fourth proportional to 431,946,985.60, 647,977,310.40 and 159,509,123.20 is: 239,284,671.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,946,985.60 : 647,977,310.40 = 159,509,123.20 : x
  2. Step 2: Convert to fraction form
    431,946,985.60/647,977,310.40 = 159,509,123.20/x
  3. Step 3: Cross multiply
    431,946,985.60x = 647,977,310.40 × 159,509,123.20
  4. Step 4: Simplify right side
    431,946,985.60x = 103,358,292,635,398,224
  5. Step 5: Solve for x
    x = 103,358,292,635,398,224/431,946,985.60
  6. Step 6: Final answer
    x = 239,284,671.69

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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.