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Finding the Fourth Proportional to 553,079.88, 761,643 and 480,449.52

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Solution

The fourth proportional to 553,079.88, 761,643 and 480,449.52 is: 661,624.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,079.88 : 761,643 = 480,449.52 : x
  2. Step 2: Convert to fraction form
    553,079.88/761,643 = 480,449.52/x
  3. Step 3: Cross multiply
    553,079.88x = 761,643 × 480,449.52
  4. Step 4: Simplify right side
    553,079.88x = 365,931,013,761.36
  5. Step 5: Solve for x
    x = 365,931,013,761.36/553,079.88
  6. Step 6: Final answer
    x = 661,624.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.