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Finding the Fourth Proportional to 402,443.70, 603,665.55 and 260,726.10

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Solution

The fourth proportional to 402,443.70, 603,665.55 and 260,726.10 is: 391,089.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,443.70 : 603,665.55 = 260,726.10 : x
  2. Step 2: Convert to fraction form
    402,443.70/603,665.55 = 260,726.10/x
  3. Step 3: Cross multiply
    402,443.70x = 603,665.55 × 260,726.10
  4. Step 4: Simplify right side
    402,443.70x = 157,391,364,555.86
  5. Step 5: Solve for x
    x = 157,391,364,555.86/402,443.70
  6. Step 6: Final answer
    x = 391,089.15

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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.