Home / 428,032,560.80-642,048,841.20-319,033,085.60

Finding the Fourth Proportional to 428,032,560.80, 642,048,841.20 and 319,033,085.60

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Solution

The fourth proportional to 428,032,560.80, 642,048,841.20 and 319,033,085.60 is: 478,549,628.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,032,560.80 : 642,048,841.20 = 319,033,085.60 : x
  2. Step 2: Convert to fraction form
    428,032,560.80/642,048,841.20 = 319,033,085.60/x
  3. Step 3: Cross multiply
    428,032,560.80x = 642,048,841.20 × 319,033,085.60
  4. Step 4: Simplify right side
    428,032,560.80x = 204,834,822,913,940,448
  5. Step 5: Solve for x
    x = 204,834,822,913,940,448/428,032,560.80
  6. Step 6: Final answer
    x = 478,549,628.40

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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.