Home / 645,445.68-890,739.60-358,986.48

Finding the Fourth Proportional to 645,445.68, 890,739.60 and 358,986.48

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Solution

The fourth proportional to 645,445.68, 890,739.60 and 358,986.48 is: 495,415.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,445.68 : 890,739.60 = 358,986.48 : x
  2. Step 2: Convert to fraction form
    645,445.68/890,739.60 = 358,986.48/x
  3. Step 3: Cross multiply
    645,445.68x = 890,739.60 × 358,986.48
  4. Step 4: Simplify right side
    645,445.68x = 319,763,473,600.61
  5. Step 5: Solve for x
    x = 319,763,473,600.61/645,445.68
  6. Step 6: Final answer
    x = 495,415.00

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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.