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Finding the Fourth Proportional to 618,401.97, 853,429.80 and 346,557.51

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Solution

The fourth proportional to 618,401.97, 853,429.80 and 346,557.51 is: 478,269.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,401.97 : 853,429.80 = 346,557.51 : x
  2. Step 2: Convert to fraction form
    618,401.97/853,429.80 = 346,557.51/x
  3. Step 3: Cross multiply
    618,401.97x = 853,429.80 × 346,557.51
  4. Step 4: Simplify right side
    618,401.97x = 295,762,506,447.80
  5. Step 5: Solve for x
    x = 295,762,506,447.80/618,401.97
  6. Step 6: Final answer
    x = 478,269.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.