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Finding the Fourth Proportional to 403,060.84, 555,769.30 and 310,970.36

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Solution

The fourth proportional to 403,060.84, 555,769.30 and 310,970.36 is: 428,788.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,060.84 : 555,769.30 = 310,970.36 : x
  2. Step 2: Convert to fraction form
    403,060.84/555,769.30 = 310,970.36/x
  3. Step 3: Cross multiply
    403,060.84x = 555,769.30 × 310,970.36
  4. Step 4: Simplify right side
    403,060.84x = 172,827,779,297.95
  5. Step 5: Solve for x
    x = 172,827,779,297.95/403,060.84
  6. Step 6: Final answer
    x = 428,788.32

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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.