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Finding the Fourth Proportional to 393,661,569.60, 590,492,354.40 and 291,624,897.60

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Solution

The fourth proportional to 393,661,569.60, 590,492,354.40 and 291,624,897.60 is: 437,437,346.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,661,569.60 : 590,492,354.40 = 291,624,897.60 : x
  2. Step 2: Convert to fraction form
    393,661,569.60/590,492,354.40 = 291,624,897.60/x
  3. Step 3: Cross multiply
    393,661,569.60x = 590,492,354.40 × 291,624,897.60
  4. Step 4: Simplify right side
    393,661,569.60x = 172,202,272,385,482,912
  5. Step 5: Solve for x
    x = 172,202,272,385,482,912/393,661,569.60
  6. Step 6: Final answer
    x = 437,437,346.40

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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.