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Finding the Fourth Proportional to 565,511.04, 780,385.44 and 310,860.40

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Solution

The fourth proportional to 565,511.04, 780,385.44 and 310,860.40 is: 428,976.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,511.04 : 780,385.44 = 310,860.40 : x
  2. Step 2: Convert to fraction form
    565,511.04/780,385.44 = 310,860.40/x
  3. Step 3: Cross multiply
    565,511.04x = 780,385.44 × 310,860.40
  4. Step 4: Simplify right side
    565,511.04x = 242,590,930,032.58
  5. Step 5: Solve for x
    x = 242,590,930,032.58/565,511.04
  6. Step 6: Final answer
    x = 428,976.47

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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.