Home / 645,313.86-890,496.55-358,827.80

Finding the Fourth Proportional to 645,313.86, 890,496.55 and 358,827.80

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Solution

The fourth proportional to 645,313.86, 890,496.55 and 358,827.80 is: 495,162.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,313.86 : 890,496.55 = 358,827.80 : x
  2. Step 2: Convert to fraction form
    645,313.86/890,496.55 = 358,827.80/x
  3. Step 3: Cross multiply
    645,313.86x = 890,496.55 × 358,827.80
  4. Step 4: Simplify right side
    645,313.86x = 319,534,911,697.47
  5. Step 5: Solve for x
    x = 319,534,911,697.47/645,313.86
  6. Step 6: Final answer
    x = 495,162.02

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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.