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Finding the Fourth Proportional to 390,658.60, 586,020.30 and 124,411.60

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Solution

The fourth proportional to 390,658.60, 586,020.30 and 124,411.60 is: 186,627.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,658.60 : 586,020.30 = 124,411.60 : x
  2. Step 2: Convert to fraction form
    390,658.60/586,020.30 = 124,411.60/x
  3. Step 3: Cross multiply
    390,658.60x = 586,020.30 × 124,411.60
  4. Step 4: Simplify right side
    390,658.60x = 72,907,723,155.48
  5. Step 5: Solve for x
    x = 72,907,723,155.48/390,658.60
  6. Step 6: Final answer
    x = 186,627.72

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1.5x scale

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.