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Finding the Fourth Proportional to 610,859.40, 918,257.40 and 434,587.20

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Solution

The fourth proportional to 610,859.40, 918,257.40 and 434,587.20 is: 653,281.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,859.40 : 918,257.40 = 434,587.20 : x
  2. Step 2: Convert to fraction form
    610,859.40/918,257.40 = 434,587.20/x
  3. Step 3: Cross multiply
    610,859.40x = 918,257.40 × 434,587.20
  4. Step 4: Simplify right side
    610,859.40x = 399,062,912,345.28
  5. Step 5: Solve for x
    x = 399,062,912,345.28/610,859.40
  6. Step 6: Final answer
    x = 653,281.12

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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.