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Finding the Fourth Proportional to 432,077.80, 648,116.70 and 429,453.40

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Solution

The fourth proportional to 432,077.80, 648,116.70 and 429,453.40 is: 644,180.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,077.80 : 648,116.70 = 429,453.40 : x
  2. Step 2: Convert to fraction form
    432,077.80/648,116.70 = 429,453.40/x
  3. Step 3: Cross multiply
    432,077.80x = 648,116.70 × 429,453.40
  4. Step 4: Simplify right side
    432,077.80x = 278,335,920,411.78
  5. Step 5: Solve for x
    x = 278,335,920,411.78/432,077.80
  6. Step 6: Final answer
    x = 644,180.10

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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.