Home / 665,890.68-918,719.76-407,498.25

Finding the Fourth Proportional to 665,890.68, 918,719.76 and 407,498.25

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Solution

The fourth proportional to 665,890.68, 918,719.76 and 407,498.25 is: 562,219.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,890.68 : 918,719.76 = 407,498.25 : x
  2. Step 2: Convert to fraction form
    665,890.68/918,719.76 = 407,498.25/x
  3. Step 3: Cross multiply
    665,890.68x = 918,719.76 × 407,498.25
  4. Step 4: Simplify right side
    665,890.68x = 374,376,694,440.42
  5. Step 5: Solve for x
    x = 374,376,694,440.42/665,890.68
  6. Step 6: Final answer
    x = 562,219.45

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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.