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Finding the Fourth Proportional to 500,374.35, 689,830.20 and 316,521.45

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Solution

The fourth proportional to 500,374.35, 689,830.20 and 316,521.45 is: 436,365.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,374.35 : 689,830.20 = 316,521.45 : x
  2. Step 2: Convert to fraction form
    500,374.35/689,830.20 = 316,521.45/x
  3. Step 3: Cross multiply
    500,374.35x = 689,830.20 × 316,521.45
  4. Step 4: Simplify right side
    500,374.35x = 218,346,055,157.79
  5. Step 5: Solve for x
    x = 218,346,055,157.79/500,374.35
  6. Step 6: Final answer
    x = 436,365.40

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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.