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Finding the Fourth Proportional to 391,030.84, 586,572.89 and 124,811.40

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Solution

The fourth proportional to 391,030.84, 586,572.89 and 124,811.40 is: 187,225.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,030.84 : 586,572.89 = 124,811.40 : x
  2. Step 2: Convert to fraction form
    391,030.84/586,572.89 = 124,811.40/x
  3. Step 3: Cross multiply
    391,030.84x = 586,572.89 × 124,811.40
  4. Step 4: Simplify right side
    391,030.84x = 73,210,983,602.95
  5. Step 5: Solve for x
    x = 73,210,983,602.95/391,030.84
  6. Step 6: Final answer
    x = 187,225.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.