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Finding the Fourth Proportional to 390,603, 539,027.28 and 229,472.76

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Solution

The fourth proportional to 390,603, 539,027.28 and 229,472.76 is: 316,669.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,603 : 539,027.28 = 229,472.76 : x
  2. Step 2: Convert to fraction form
    390,603/539,027.28 = 229,472.76/x
  3. Step 3: Cross multiply
    390,603x = 539,027.28 × 229,472.76
  4. Step 4: Simplify right side
    390,603x = 123,692,077,656.89
  5. Step 5: Solve for x
    x = 123,692,077,656.89/390,603
  6. Step 6: Final answer
    x = 316,669.55

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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.