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Finding the Fourth Proportional to 869,807,483.90, 1,200,334,505.37 and 478,666,907.90

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Solution

The fourth proportional to 869,807,483.90, 1,200,334,505.37 and 478,666,907.90 is: 660,560,430.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,807,483.90 : 1,200,334,505.37 = 478,666,907.90 : x
  2. Step 2: Convert to fraction form
    869,807,483.90/1,200,334,505.37 = 478,666,907.90/x
  3. Step 3: Cross multiply
    869,807,483.90x = 1,200,334,505.37 × 478,666,907.90
  4. Step 4: Simplify right side
    869,807,483.90x = 574,560,406,131,133,760
  5. Step 5: Solve for x
    x = 574,560,406,131,133,760/869,807,483.90
  6. Step 6: Final answer
    x = 660,560,430.63

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.