Home / 765,403.40-1,148,364.55-338,880.39

Finding the Fourth Proportional to 765,403.40, 1,148,364.55 and 338,880.39

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Solution

The fourth proportional to 765,403.40, 1,148,364.55 and 338,880.39 is: 508,435.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,403.40 : 1,148,364.55 = 338,880.39 : x
  2. Step 2: Convert to fraction form
    765,403.40/1,148,364.55 = 338,880.39/x
  3. Step 3: Cross multiply
    765,403.40x = 1,148,364.55 × 338,880.39
  4. Step 4: Simplify right side
    765,403.40x = 389,158,226,566.18
  5. Step 5: Solve for x
    x = 389,158,226,566.18/765,403.40
  6. Step 6: Final answer
    x = 508,435.46

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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.