Home / 645,108.63-890,280.29-358,633.50

Finding the Fourth Proportional to 645,108.63, 890,280.29 and 358,633.50

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Solution

The fourth proportional to 645,108.63, 890,280.29 and 358,633.50 is: 494,931.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,108.63 : 890,280.29 = 358,633.50 : x
  2. Step 2: Convert to fraction form
    645,108.63/890,280.29 = 358,633.50/x
  3. Step 3: Cross multiply
    645,108.63x = 890,280.29 × 358,633.50
  4. Step 4: Simplify right side
    645,108.63x = 319,284,337,280.30
  5. Step 5: Solve for x
    x = 319,284,337,280.30/645,108.63
  6. Step 6: Final answer
    x = 494,931.12

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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.