Home / 643,423.59-887,925.60-356,943.68

Finding the Fourth Proportional to 643,423.59, 887,925.60 and 356,943.68

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Solution

The fourth proportional to 643,423.59, 887,925.60 and 356,943.68 is: 492,582.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,423.59 : 887,925.60 = 356,943.68 : x
  2. Step 2: Convert to fraction form
    643,423.59/887,925.60 = 356,943.68/x
  3. Step 3: Cross multiply
    643,423.59x = 887,925.60 × 356,943.68
  4. Step 4: Simplify right side
    643,423.59x = 316,939,430,120.30
  5. Step 5: Solve for x
    x = 316,939,430,120.30/643,423.59
  6. Step 6: Final answer
    x = 492,582.86

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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.