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Finding the Fourth Proportional to 1,208,507,000.58, 1,667,644,265.61 and 679,765,720.86

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Solution

The fourth proportional to 1,208,507,000.58, 1,667,644,265.61 and 679,765,720.86 is: 938,023,036.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208,507,000.58 : 1,667,644,265.61 = 679,765,720.86 : x
  2. Step 2: Convert to fraction form
    1,208,507,000.58/1,667,644,265.61 = 679,765,720.86/x
  3. Step 3: Cross multiply
    1,208,507,000.58x = 1,667,644,265.61 × 679,765,720.86
  4. Step 4: Simplify right side
    1,208,507,000.58x = 1,133,607,406,350,494,976
  5. Step 5: Solve for x
    x = 1,133,607,406,350,494,976/1,208,507,000.58
  6. Step 6: Final answer
    x = 938,023,036.53

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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.