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Finding the Fourth Proportional to 672,728.43, 928,590.19 and 400,881.60

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Solution

The fourth proportional to 672,728.43, 928,590.19 and 400,881.60 is: 553,350.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,728.43 : 928,590.19 = 400,881.60 : x
  2. Step 2: Convert to fraction form
    672,728.43/928,590.19 = 400,881.60/x
  3. Step 3: Cross multiply
    672,728.43x = 928,590.19 × 400,881.60
  4. Step 4: Simplify right side
    672,728.43x = 372,254,716,468.55
  5. Step 5: Solve for x
    x = 372,254,716,468.55/672,728.43
  6. Step 6: Final answer
    x = 553,350.66

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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.