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Finding the Fourth Proportional to 642,759.68, 887,051.04 and 356,291.84

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Solution

The fourth proportional to 642,759.68, 887,051.04 and 356,291.84 is: 491,706.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,759.68 : 887,051.04 = 356,291.84 : x
  2. Step 2: Convert to fraction form
    642,759.68/887,051.04 = 356,291.84/x
  3. Step 3: Cross multiply
    642,759.68x = 887,051.04 × 356,291.84
  4. Step 4: Simplify right side
    642,759.68x = 316,049,047,215.51
  5. Step 5: Solve for x
    x = 316,049,047,215.51/642,759.68
  6. Step 6: Final answer
    x = 491,706.40

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1.5x scale

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.