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Finding the Fourth Proportional to 570,618.47, 787,453.45 and 315,969.66

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Solution

The fourth proportional to 570,618.47, 787,453.45 and 315,969.66 is: 436,038.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,618.47 : 787,453.45 = 315,969.66 : x
  2. Step 2: Convert to fraction form
    570,618.47/787,453.45 = 315,969.66/x
  3. Step 3: Cross multiply
    570,618.47x = 787,453.45 × 315,969.66
  4. Step 4: Simplify right side
    570,618.47x = 248,811,398,072.40
  5. Step 5: Solve for x
    x = 248,811,398,072.40/570,618.47
  6. Step 6: Final answer
    x = 436,038.11

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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.