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Finding the Fourth Proportional to 645,995.61, 891,465.24 and 359,515.62

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Solution

The fourth proportional to 645,995.61, 891,465.24 and 359,515.62 is: 496,126.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,995.61 : 891,465.24 = 359,515.62 : x
  2. Step 2: Convert to fraction form
    645,995.61/891,465.24 = 359,515.62/x
  3. Step 3: Cross multiply
    645,995.61x = 891,465.24 × 359,515.62
  4. Step 4: Simplify right side
    645,995.61x = 320,495,678,467.05
  5. Step 5: Solve for x
    x = 320,495,678,467.05/645,995.61
  6. Step 6: Final answer
    x = 496,126.71

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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.