Home / 717,913.48-990,707.86-391,229.40

Finding the Fourth Proportional to 717,913.48, 990,707.86 and 391,229.40

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Solution

The fourth proportional to 717,913.48, 990,707.86 and 391,229.40 is: 539,889.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,913.48 : 990,707.86 = 391,229.40 : x
  2. Step 2: Convert to fraction form
    717,913.48/990,707.86 = 391,229.40/x
  3. Step 3: Cross multiply
    717,913.48x = 990,707.86 × 391,229.40
  4. Step 4: Simplify right side
    717,913.48x = 387,594,041,643.08
  5. Step 5: Solve for x
    x = 387,594,041,643.08/717,913.48
  6. Step 6: Final answer
    x = 539,889.63

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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.