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Finding the Fourth Proportional to 978,316.58, 1,350,270.51 and 634,578.50

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Solution

The fourth proportional to 978,316.58, 1,350,270.51 and 634,578.50 is: 875,843.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,316.58 : 1,350,270.51 = 634,578.50 : x
  2. Step 2: Convert to fraction form
    978,316.58/1,350,270.51 = 634,578.50/x
  3. Step 3: Cross multiply
    978,316.58x = 1,350,270.51 × 634,578.50
  4. Step 4: Simplify right side
    978,316.58x = 856,852,635,826.04
  5. Step 5: Solve for x
    x = 856,852,635,826.04/978,316.58
  6. Step 6: Final answer
    x = 875,843.93

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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.