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Finding the Fourth Proportional to 978,103,486.83, 1,350,402,400.40 and 607,219,079.79

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Solution

The fourth proportional to 978,103,486.83, 1,350,402,400.40 and 607,219,079.79 is: 838,346,978.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,103,486.83 : 1,350,402,400.40 = 607,219,079.79 : x
  2. Step 2: Convert to fraction form
    978,103,486.83/1,350,402,400.40 = 607,219,079.79/x
  3. Step 3: Cross multiply
    978,103,486.83x = 1,350,402,400.40 × 607,219,079.79
  4. Step 4: Simplify right side
    978,103,486.83x = 819,990,102,914,059,008
  5. Step 5: Solve for x
    x = 819,990,102,914,059,008/978,103,486.83
  6. Step 6: Final answer
    x = 838,346,978.57

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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.