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Finding the Fourth Proportional to 738,188.76, 1,018,700.40 and 398,656.92

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Solution

The fourth proportional to 738,188.76, 1,018,700.40 and 398,656.92 is: 550,146.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,188.76 : 1,018,700.40 = 398,656.92 : x
  2. Step 2: Convert to fraction form
    738,188.76/1,018,700.40 = 398,656.92/x
  3. Step 3: Cross multiply
    738,188.76x = 1,018,700.40 × 398,656.92
  4. Step 4: Simplify right side
    738,188.76x = 406,111,963,866.77
  5. Step 5: Solve for x
    x = 406,111,963,866.77/738,188.76
  6. Step 6: Final answer
    x = 550,146.50

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1.5x scale

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.