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Finding the Fourth Proportional to 390,335.61, 538,455.36 and 237,420.57

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Solution

The fourth proportional to 390,335.61, 538,455.36 and 237,420.57 is: 327,514.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,335.61 : 538,455.36 = 237,420.57 : x
  2. Step 2: Convert to fraction form
    390,335.61/538,455.36 = 237,420.57/x
  3. Step 3: Cross multiply
    390,335.61x = 538,455.36 × 237,420.57
  4. Step 4: Simplify right side
    390,335.61x = 127,840,378,490.76
  5. Step 5: Solve for x
    x = 127,840,378,490.76/390,335.61
  6. Step 6: Final answer
    x = 327,514.00

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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.