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Finding the Fourth Proportional to 642,126.80, 886,730.64 and 480,701.60

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Solution

The fourth proportional to 642,126.80, 886,730.64 and 480,701.60 is: 663,814.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,126.80 : 886,730.64 = 480,701.60 : x
  2. Step 2: Convert to fraction form
    642,126.80/886,730.64 = 480,701.60/x
  3. Step 3: Cross multiply
    642,126.80x = 886,730.64 × 480,701.60
  4. Step 4: Simplify right side
    642,126.80x = 426,252,832,983.37
  5. Step 5: Solve for x
    x = 426,252,832,983.37/642,126.80
  6. Step 6: Final answer
    x = 663,814.12

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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.