Home / 643,421.58-964,225.18-355,363.10

Finding the Fourth Proportional to 643,421.58, 964,225.18 and 355,363.10

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Solution

The fourth proportional to 643,421.58, 964,225.18 and 355,363.10 is: 532,543.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,421.58 : 964,225.18 = 355,363.10 : x
  2. Step 2: Convert to fraction form
    643,421.58/964,225.18 = 355,363.10/x
  3. Step 3: Cross multiply
    643,421.58x = 964,225.18 × 355,363.10
  4. Step 4: Simplify right side
    643,421.58x = 342,650,048,301.78
  5. Step 5: Solve for x
    x = 342,650,048,301.78/643,421.58
  6. Step 6: Final answer
    x = 532,543.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.