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Finding the Fourth Proportional to 715,960.48, 987,806.64 and 470,875.36

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Solution

The fourth proportional to 715,960.48, 987,806.64 and 470,875.36 is: 649,664.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,960.48 : 987,806.64 = 470,875.36 : x
  2. Step 2: Convert to fraction form
    715,960.48/987,806.64 = 470,875.36/x
  3. Step 3: Cross multiply
    715,960.48x = 987,806.64 × 470,875.36
  4. Step 4: Simplify right side
    715,960.48x = 465,133,807,220.39
  5. Step 5: Solve for x
    x = 465,133,807,220.39/715,960.48
  6. Step 6: Final answer
    x = 649,664.08

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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.