Home / 645,125.77-890,303.94-358,650.64

Finding the Fourth Proportional to 645,125.77, 890,303.94 and 358,650.64

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Solution

The fourth proportional to 645,125.77, 890,303.94 and 358,650.64 is: 494,954.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,125.77 : 890,303.94 = 358,650.64 : x
  2. Step 2: Convert to fraction form
    645,125.77/890,303.94 = 358,650.64/x
  3. Step 3: Cross multiply
    645,125.77x = 890,303.94 × 358,650.64
  4. Step 4: Simplify right side
    645,125.77x = 319,308,077,875.52
  5. Step 5: Solve for x
    x = 319,308,077,875.52/645,125.77
  6. Step 6: Final answer
    x = 494,954.77

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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.