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Finding the Fourth Proportional to 704,985.48, 972,864.44 and 399,055.76

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Solution

The fourth proportional to 704,985.48, 972,864.44 and 399,055.76 is: 550,688.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,985.48 : 972,864.44 = 399,055.76 : x
  2. Step 2: Convert to fraction form
    704,985.48/972,864.44 = 399,055.76/x
  3. Step 3: Cross multiply
    704,985.48x = 972,864.44 × 399,055.76
  4. Step 4: Simplify right side
    704,985.48x = 388,227,158,481.17
  5. Step 5: Solve for x
    x = 388,227,158,481.17/704,985.48
  6. Step 6: Final answer
    x = 550,688.16

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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.