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Finding the Fourth Proportional to 620,479.48, 856,341.86 and 348,547.48

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Solution

The fourth proportional to 620,479.48, 856,341.86 and 348,547.48 is: 481,040.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,479.48 : 856,341.86 = 348,547.48 : x
  2. Step 2: Convert to fraction form
    620,479.48/856,341.86 = 348,547.48/x
  3. Step 3: Cross multiply
    620,479.48x = 856,341.86 × 348,547.48
  4. Step 4: Simplify right side
    620,479.48x = 298,475,797,321.51
  5. Step 5: Solve for x
    x = 298,475,797,321.51/620,479.48
  6. Step 6: Final answer
    x = 481,040.56

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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.