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Finding the Fourth Proportional to 660,669.95, 991,152.56 and 211,417.79

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Solution

The fourth proportional to 660,669.95, 991,152.56 and 211,417.79 is: 317,173.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,669.95 : 991,152.56 = 211,417.79 : x
  2. Step 2: Convert to fraction form
    660,669.95/991,152.56 = 211,417.79/x
  3. Step 3: Cross multiply
    660,669.95x = 991,152.56 × 211,417.79
  4. Step 4: Simplify right side
    660,669.95x = 209,547,279,360.82
  5. Step 5: Solve for x
    x = 209,547,279,360.82/660,669.95
  6. Step 6: Final answer
    x = 317,173.92

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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.