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Finding the Fourth Proportional to 280,607.95, 420,953.45 and 103,101.13

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Solution

The fourth proportional to 280,607.95, 420,953.45 and 103,101.13 is: 154,666.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,607.95 : 420,953.45 = 103,101.13 : x
  2. Step 2: Convert to fraction form
    280,607.95/420,953.45 = 103,101.13/x
  3. Step 3: Cross multiply
    280,607.95x = 420,953.45 × 103,101.13
  4. Step 4: Simplify right side
    280,607.95x = 43,400,774,804.51
  5. Step 5: Solve for x
    x = 43,400,774,804.51/280,607.95
  6. Step 6: Final answer
    x = 154,666.95

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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.