Home / 831,174,139.60-1,245,938,897.40-393,705,905.20

Finding the Fourth Proportional to 831,174,139.60, 1,245,938,897.40 and 393,705,905.20

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Solution

The fourth proportional to 831,174,139.60, 1,245,938,897.40 and 393,705,905.20 is: 590,169,349.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,174,139.60 : 1,245,938,897.40 = 393,705,905.20 : x
  2. Step 2: Convert to fraction form
    831,174,139.60/1,245,938,897.40 = 393,705,905.20/x
  3. Step 3: Cross multiply
    831,174,139.60x = 1,245,938,897.40 × 393,705,905.20
  4. Step 4: Simplify right side
    831,174,139.60x = 490,533,501,424,756,928
  5. Step 5: Solve for x
    x = 490,533,501,424,756,928/831,174,139.60
  6. Step 6: Final answer
    x = 590,169,349.66

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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.