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Finding the Fourth Proportional to 521,534,430.40, 782,301,645.60 and 521,534,430.40

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Solution

The fourth proportional to 521,534,430.40, 782,301,645.60 and 521,534,430.40 is: 782,301,645.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,534,430.40 : 782,301,645.60 = 521,534,430.40 : x
  2. Step 2: Convert to fraction form
    521,534,430.40/782,301,645.60 = 521,534,430.40/x
  3. Step 3: Cross multiply
    521,534,430.40x = 782,301,645.60 × 521,534,430.40
  4. Step 4: Simplify right side
    521,534,430.40x = 407,997,243,138,978,688
  5. Step 5: Solve for x
    x = 407,997,243,138,978,688/521,534,430.40
  6. Step 6: Final answer
    x = 782,301,645.60

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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.