Home / 645,486.66-890,803.17-359,000.64

Finding the Fourth Proportional to 645,486.66, 890,803.17 and 359,000.64

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Solution

The fourth proportional to 645,486.66, 890,803.17 and 359,000.64 is: 495,438.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,486.66 : 890,803.17 = 359,000.64 : x
  2. Step 2: Convert to fraction form
    645,486.66/890,803.17 = 359,000.64/x
  3. Step 3: Cross multiply
    645,486.66x = 890,803.17 × 359,000.64
  4. Step 4: Simplify right side
    645,486.66x = 319,798,908,144.03
  5. Step 5: Solve for x
    x = 319,798,908,144.03/645,486.66
  6. Step 6: Final answer
    x = 495,438.45

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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.