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Finding the Fourth Proportional to 287,472,807.60, 431,209,211.40 and 219,448,359.60

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Solution

The fourth proportional to 287,472,807.60, 431,209,211.40 and 219,448,359.60 is: 329,172,539.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,472,807.60 : 431,209,211.40 = 219,448,359.60 : x
  2. Step 2: Convert to fraction form
    287,472,807.60/431,209,211.40 = 219,448,359.60/x
  3. Step 3: Cross multiply
    287,472,807.60x = 431,209,211.40 × 219,448,359.60
  4. Step 4: Simplify right side
    287,472,807.60x = 94,628,154,086,139,616
  5. Step 5: Solve for x
    x = 94,628,154,086,139,616/287,472,807.60
  6. Step 6: Final answer
    x = 329,172,539.40

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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.