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Finding the Fourth Proportional to 420,230.16, 630,230.76 and 139,710.96

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Solution

The fourth proportional to 420,230.16, 630,230.76 and 139,710.96 is: 209,528.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,230.16 : 630,230.76 = 139,710.96 : x
  2. Step 2: Convert to fraction form
    420,230.16/630,230.76 = 139,710.96/x
  3. Step 3: Cross multiply
    420,230.16x = 630,230.76 × 139,710.96
  4. Step 4: Simplify right side
    420,230.16x = 88,050,144,501.13
  5. Step 5: Solve for x
    x = 88,050,144,501.13/420,230.16
  6. Step 6: Final answer
    x = 209,528.38

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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.