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Finding the Fourth Proportional to 692,238.48, 955,289.88 and 390,432.48

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Solution

The fourth proportional to 692,238.48, 955,289.88 and 390,432.48 is: 538,797.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,238.48 : 955,289.88 = 390,432.48 : x
  2. Step 2: Convert to fraction form
    692,238.48/955,289.88 = 390,432.48/x
  3. Step 3: Cross multiply
    692,238.48x = 955,289.88 × 390,432.48
  4. Step 4: Simplify right side
    692,238.48x = 372,976,196,967.30
  5. Step 5: Solve for x
    x = 372,976,196,967.30/692,238.48
  6. Step 6: Final answer
    x = 538,797.26

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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.