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Finding the Fourth Proportional to 692,178.84, 955,206.72 and 390,372.84

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Solution

The fourth proportional to 692,178.84, 955,206.72 and 390,372.84 is: 538,714.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,178.84 : 955,206.72 = 390,372.84 : x
  2. Step 2: Convert to fraction form
    692,178.84/955,206.72 = 390,372.84/x
  3. Step 3: Cross multiply
    692,178.84x = 955,206.72 × 390,372.84
  4. Step 4: Simplify right side
    692,178.84x = 372,886,760,073.49
  5. Step 5: Solve for x
    x = 372,886,760,073.49/692,178.84
  6. Step 6: Final answer
    x = 538,714.47

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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.