Home / 1,178,155,330.40-1,766,848,368.72-390,997,537.76

Finding the Fourth Proportional to 1,178,155,330.40, 1,766,848,368.72 and 390,997,537.76

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Solution

The fourth proportional to 1,178,155,330.40, 1,766,848,368.72 and 390,997,537.76 is: 586,368,659.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178,155,330.40 : 1,766,848,368.72 = 390,997,537.76 : x
  2. Step 2: Convert to fraction form
    1,178,155,330.40/1,766,848,368.72 = 390,997,537.76/x
  3. Step 3: Cross multiply
    1,178,155,330.40x = 1,766,848,368.72 × 390,997,537.76
  4. Step 4: Simplify right side
    1,178,155,330.40x = 690,833,361,764,792,576
  5. Step 5: Solve for x
    x = 690,833,361,764,792,576/1,178,155,330.40
  6. Step 6: Final answer
    x = 586,368,659.50

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Double scale
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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.