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Finding the Fourth Proportional to 660,998.40, 912,343.68 and 374,689.32

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Solution

The fourth proportional to 660,998.40, 912,343.68 and 374,689.32 is: 517,165.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,998.40 : 912,343.68 = 374,689.32 : x
  2. Step 2: Convert to fraction form
    660,998.40/912,343.68 = 374,689.32/x
  3. Step 3: Cross multiply
    660,998.40x = 912,343.68 × 374,689.32
  4. Step 4: Simplify right side
    660,998.40x = 341,845,433,065.50
  5. Step 5: Solve for x
    x = 341,845,433,065.50/660,998.40
  6. Step 6: Final answer
    x = 517,165.30

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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.