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Finding the Fourth Proportional to 570,646.25, 787,482.10 and 315,991.97

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Solution

The fourth proportional to 570,646.25, 787,482.10 and 315,991.97 is: 436,063.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,646.25 : 787,482.10 = 315,991.97 : x
  2. Step 2: Convert to fraction form
    570,646.25/787,482.10 = 315,991.97/x
  3. Step 3: Cross multiply
    570,646.25x = 787,482.10 × 315,991.97
  4. Step 4: Simplify right side
    570,646.25x = 248,838,018,538.78
  5. Step 5: Solve for x
    x = 248,838,018,538.78/570,646.25
  6. Step 6: Final answer
    x = 436,063.53

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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.