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Finding the Fourth Proportional to 261,030.45, 391,545.68 and 245,478.45

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Solution

The fourth proportional to 261,030.45, 391,545.68 and 245,478.45 is: 368,217.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,030.45 : 391,545.68 = 245,478.45 : x
  2. Step 2: Convert to fraction form
    261,030.45/391,545.68 = 245,478.45/x
  3. Step 3: Cross multiply
    261,030.45x = 391,545.68 × 245,478.45
  4. Step 4: Simplify right side
    261,030.45x = 96,116,025,403.20
  5. Step 5: Solve for x
    x = 96,116,025,403.20/261,030.45
  6. Step 6: Final answer
    x = 368,217.68

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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.