Home / 643,031.56-887,302.02-352,566.72

Finding the Fourth Proportional to 643,031.56, 887,302.02 and 352,566.72

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Solution

The fourth proportional to 643,031.56, 887,302.02 and 352,566.72 is: 486,497.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,031.56 : 887,302.02 = 352,566.72 : x
  2. Step 2: Convert to fraction form
    643,031.56/887,302.02 = 352,566.72/x
  3. Step 3: Cross multiply
    643,031.56x = 887,302.02 × 352,566.72
  4. Step 4: Simplify right side
    643,031.56x = 312,833,162,840.77
  5. Step 5: Solve for x
    x = 312,833,162,840.77/643,031.56
  6. Step 6: Final answer
    x = 486,497.37

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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.