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Finding the Fourth Proportional to 348,030.80, 521,009.40 and 207,717.20

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Solution

The fourth proportional to 348,030.80, 521,009.40 and 207,717.20 is: 310,957.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,030.80 : 521,009.40 = 207,717.20 : x
  2. Step 2: Convert to fraction form
    348,030.80/521,009.40 = 207,717.20/x
  3. Step 3: Cross multiply
    348,030.80x = 521,009.40 × 207,717.20
  4. Step 4: Simplify right side
    348,030.80x = 108,222,613,741.68
  5. Step 5: Solve for x
    x = 108,222,613,741.68/348,030.80
  6. Step 6: Final answer
    x = 310,957.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.