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Finding the Fourth Proportional to 425,155.76, 637,823.60 and 140,830.22

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Solution

The fourth proportional to 425,155.76, 637,823.60 and 140,830.22 is: 211,275.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,155.76 : 637,823.60 = 140,830.22 : x
  2. Step 2: Convert to fraction form
    425,155.76/637,823.60 = 140,830.22/x
  3. Step 3: Cross multiply
    425,155.76x = 637,823.60 × 140,830.22
  4. Step 4: Simplify right side
    425,155.76x = 89,824,837,909.19
  5. Step 5: Solve for x
    x = 89,824,837,909.19/425,155.76
  6. Step 6: Final answer
    x = 211,275.13

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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.