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Finding the Fourth Proportional to 390,938.88, 586,033.80 and 124,526.76

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Solution

The fourth proportional to 390,938.88, 586,033.80 and 124,526.76 is: 186,670.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,938.88 : 586,033.80 = 124,526.76 : x
  2. Step 2: Convert to fraction form
    390,938.88/586,033.80 = 124,526.76/x
  3. Step 3: Cross multiply
    390,938.88x = 586,033.80 × 124,526.76
  4. Step 4: Simplify right side
    390,938.88x = 72,976,890,364.49
  5. Step 5: Solve for x
    x = 72,976,890,364.49/390,938.88
  6. Step 6: Final answer
    x = 186,670.84

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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.