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Finding the Fourth Proportional to 390,420.72, 538,572.24 and 237,505.68

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Solution

The fourth proportional to 390,420.72, 538,572.24 and 237,505.68 is: 327,631.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,420.72 : 538,572.24 = 237,505.68 : x
  2. Step 2: Convert to fraction form
    390,420.72/538,572.24 = 237,505.68/x
  3. Step 3: Cross multiply
    390,420.72x = 538,572.24 × 237,505.68
  4. Step 4: Simplify right side
    390,420.72x = 127,913,966,090.32
  5. Step 5: Solve for x
    x = 127,913,966,090.32/390,420.72
  6. Step 6: Final answer
    x = 327,631.09

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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.