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Finding the Fourth Proportional to 426,521.95, 640,275.00 and 216,602.76

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Solution

The fourth proportional to 426,521.95, 640,275.00 and 216,602.76 is: 325,154.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,521.95 : 640,275.00 = 216,602.76 : x
  2. Step 2: Convert to fraction form
    426,521.95/640,275.00 = 216,602.76/x
  3. Step 3: Cross multiply
    426,521.95x = 640,275.00 × 216,602.76
  4. Step 4: Simplify right side
    426,521.95x = 138,685,331,973.81
  5. Step 5: Solve for x
    x = 138,685,331,973.81/426,521.95
  6. Step 6: Final answer
    x = 325,154.03

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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.