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Finding the Fourth Proportional to 664,356,313.60, 996,534,470.40 and 406,075,987.60

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Solution

The fourth proportional to 664,356,313.60, 996,534,470.40 and 406,075,987.60 is: 609,113,981.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,356,313.60 : 996,534,470.40 = 406,075,987.60 : x
  2. Step 2: Convert to fraction form
    664,356,313.60/996,534,470.40 = 406,075,987.60/x
  3. Step 3: Cross multiply
    664,356,313.60x = 996,534,470.40 × 406,075,987.60
  4. Step 4: Simplify right side
    664,356,313.60x = 404,668,719,245,123,008
  5. Step 5: Solve for x
    x = 404,668,719,245,123,008/664,356,313.60
  6. Step 6: Final answer
    x = 609,113,981.40

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1.5x scale

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.