Home / 558,021.40-837,032.10-390,059.80

Finding the Fourth Proportional to 558,021.40, 837,032.10 and 390,059.80

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Solution

The fourth proportional to 558,021.40, 837,032.10 and 390,059.80 is: 585,089.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,021.40 : 837,032.10 = 390,059.80 : x
  2. Step 2: Convert to fraction form
    558,021.40/837,032.10 = 390,059.80/x
  3. Step 3: Cross multiply
    558,021.40x = 837,032.10 × 390,059.80
  4. Step 4: Simplify right side
    558,021.40x = 326,492,573,519.58
  5. Step 5: Solve for x
    x = 326,492,573,519.58/558,021.40
  6. Step 6: Final answer
    x = 585,089.70

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.