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Finding the Fourth Proportional to 618,295.68, 853,280 and 346,347.68

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Solution

The fourth proportional to 618,295.68, 853,280 and 346,347.68 is: 477,977.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,295.68 : 853,280 = 346,347.68 : x
  2. Step 2: Convert to fraction form
    618,295.68/853,280 = 346,347.68/x
  3. Step 3: Cross multiply
    618,295.68x = 853,280 × 346,347.68
  4. Step 4: Simplify right side
    618,295.68x = 295,531,548,390.40
  5. Step 5: Solve for x
    x = 295,531,548,390.40/618,295.68
  6. Step 6: Final answer
    x = 477,977.70

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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.