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Finding the Fourth Proportional to 648,651.65, 972,980.95 and 425,425.66

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Solution

The fourth proportional to 648,651.65, 972,980.95 and 425,425.66 is: 638,140.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,651.65 : 972,980.95 = 425,425.66 : x
  2. Step 2: Convert to fraction form
    648,651.65/972,980.95 = 425,425.66/x
  3. Step 3: Cross multiply
    648,651.65x = 972,980.95 × 425,425.66
  4. Step 4: Simplify right side
    648,651.65x = 413,931,062,821.18
  5. Step 5: Solve for x
    x = 413,931,062,821.18/648,651.65
  6. Step 6: Final answer
    x = 638,140.77

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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.