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Finding the Fourth Proportional to 404,335.90, 606,503.85 and 278,364.70

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Solution

The fourth proportional to 404,335.90, 606,503.85 and 278,364.70 is: 417,547.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,335.90 : 606,503.85 = 278,364.70 : x
  2. Step 2: Convert to fraction form
    404,335.90/606,503.85 = 278,364.70/x
  3. Step 3: Cross multiply
    404,335.90x = 606,503.85 × 278,364.70
  4. Step 4: Simplify right side
    404,335.90x = 168,829,262,254.10
  5. Step 5: Solve for x
    x = 168,829,262,254.10/404,335.90
  6. Step 6: Final answer
    x = 417,547.05

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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.