Home / 643,051.12-887,406.96-356,613.52

Finding the Fourth Proportional to 643,051.12, 887,406.96 and 356,613.52

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Solution

The fourth proportional to 643,051.12, 887,406.96 and 356,613.52 is: 492,124.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,051.12 : 887,406.96 = 356,613.52 : x
  2. Step 2: Convert to fraction form
    643,051.12/887,406.96 = 356,613.52/x
  3. Step 3: Cross multiply
    643,051.12x = 887,406.96 × 356,613.52
  4. Step 4: Simplify right side
    643,051.12x = 316,461,319,678.10
  5. Step 5: Solve for x
    x = 316,461,319,678.10/643,051.12
  6. Step 6: Final answer
    x = 492,124.67

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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.