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Finding the Fourth Proportional to 420,718.73, 630,702.95 and 154,417.46

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Solution

The fourth proportional to 420,718.73, 630,702.95 and 154,417.46 is: 231,488.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,718.73 : 630,702.95 = 154,417.46 : x
  2. Step 2: Convert to fraction form
    420,718.73/630,702.95 = 154,417.46/x
  3. Step 3: Cross multiply
    420,718.73x = 630,702.95 × 154,417.46
  4. Step 4: Simplify right side
    420,718.73x = 97,391,543,627.91
  5. Step 5: Solve for x
    x = 97,391,543,627.91/420,718.73
  6. Step 6: Final answer
    x = 231,488.49

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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.