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Finding the Fourth Proportional to 518,090.16, 714,915.58 and 288,624.05

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Solution

The fourth proportional to 518,090.16, 714,915.58 and 288,624.05 is: 398,273.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,090.16 : 714,915.58 = 288,624.05 : x
  2. Step 2: Convert to fraction form
    518,090.16/714,915.58 = 288,624.05/x
  3. Step 3: Cross multiply
    518,090.16x = 714,915.58 × 288,624.05
  4. Step 4: Simplify right side
    518,090.16x = 206,341,830,107.70
  5. Step 5: Solve for x
    x = 206,341,830,107.70/518,090.16
  6. Step 6: Final answer
    x = 398,273.98

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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.