Home / 389,865.65-585,031.76-358,139.57

Finding the Fourth Proportional to 389,865.65, 585,031.76 and 358,139.57

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Solution

The fourth proportional to 389,865.65, 585,031.76 and 358,139.57 is: 537,423.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,865.65 : 585,031.76 = 358,139.57 : x
  2. Step 2: Convert to fraction form
    389,865.65/585,031.76 = 358,139.57/x
  3. Step 3: Cross multiply
    389,865.65x = 585,031.76 × 358,139.57
  4. Step 4: Simplify right side
    389,865.65x = 209,523,023,977.65
  5. Step 5: Solve for x
    x = 209,523,023,977.65/389,865.65
  6. Step 6: Final answer
    x = 537,423.66

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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.