Home / 390,946.22-539,227.61-358,784.74

Finding the Fourth Proportional to 390,946.22, 539,227.61 and 358,784.74

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Solution

The fourth proportional to 390,946.22, 539,227.61 and 358,784.74 is: 494,867.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,946.22 : 539,227.61 = 358,784.74 : x
  2. Step 2: Convert to fraction form
    390,946.22/539,227.61 = 358,784.74/x
  3. Step 3: Cross multiply
    390,946.22x = 539,227.61 × 358,784.74
  4. Step 4: Simplify right side
    390,946.22x = 193,466,637,854.67
  5. Step 5: Solve for x
    x = 193,466,637,854.67/390,946.22
  6. Step 6: Final answer
    x = 494,867.65

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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.