Home / 642,890.46-887,210.40-356,393.46

Finding the Fourth Proportional to 642,890.46, 887,210.40 and 356,393.46

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Solution

The fourth proportional to 642,890.46, 887,210.40 and 356,393.46 is: 491,834.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,890.46 : 887,210.40 = 356,393.46 : x
  2. Step 2: Convert to fraction form
    642,890.46/887,210.40 = 356,393.46/x
  3. Step 3: Cross multiply
    642,890.46x = 887,210.40 × 356,393.46
  4. Step 4: Simplify right side
    642,890.46x = 316,195,984,203.98
  5. Step 5: Solve for x
    x = 316,195,984,203.98/642,890.46
  6. Step 6: Final answer
    x = 491,834.93

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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.