Home / 558,001.20-837,001.80-390,039.60

Finding the Fourth Proportional to 558,001.20, 837,001.80 and 390,039.60

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Solution

The fourth proportional to 558,001.20, 837,001.80 and 390,039.60 is: 585,059.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,001.20 : 837,001.80 = 390,039.60 : x
  2. Step 2: Convert to fraction form
    558,001.20/837,001.80 = 390,039.60/x
  3. Step 3: Cross multiply
    558,001.20x = 837,001.80 × 390,039.60
  4. Step 4: Simplify right side
    558,001.20x = 326,463,847,271.28
  5. Step 5: Solve for x
    x = 326,463,847,271.28/558,001.20
  6. Step 6: Final answer
    x = 585,059.40

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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.