Home / 648,103.40-972,155.10-490,639.40

Finding the Fourth Proportional to 648,103.40, 972,155.10 and 490,639.40

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Solution

The fourth proportional to 648,103.40, 972,155.10 and 490,639.40 is: 735,959.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,103.40 : 972,155.10 = 490,639.40 : x
  2. Step 2: Convert to fraction form
    648,103.40/972,155.10 = 490,639.40/x
  3. Step 3: Cross multiply
    648,103.40x = 972,155.10 × 490,639.40
  4. Step 4: Simplify right side
    648,103.40x = 476,977,594,970.94
  5. Step 5: Solve for x
    x = 476,977,594,970.94/648,103.40
  6. Step 6: Final answer
    x = 735,959.10

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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.