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Finding the Fourth Proportional to 472,803.40, 639,528.75 and 472,803.40

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Solution

The fourth proportional to 472,803.40, 639,528.75 and 472,803.40 is: 639,528.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,803.40 : 639,528.75 = 472,803.40 : x
  2. Step 2: Convert to fraction form
    472,803.40/639,528.75 = 472,803.40/x
  3. Step 3: Cross multiply
    472,803.40x = 639,528.75 × 472,803.40
  4. Step 4: Simplify right side
    472,803.40x = 302,371,367,397.75
  5. Step 5: Solve for x
    x = 302,371,367,397.75/472,803.40
  6. Step 6: Final answer
    x = 639,528.75

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.