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Finding the Fourth Proportional to 612,635.47, 845,312.86 and 357,937.45

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Solution

The fourth proportional to 612,635.47, 845,312.86 and 357,937.45 is: 493,881.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,635.47 : 845,312.86 = 357,937.45 : x
  2. Step 2: Convert to fraction form
    612,635.47/845,312.86 = 357,937.45/x
  3. Step 3: Cross multiply
    612,635.47x = 845,312.86 × 357,937.45
  4. Step 4: Simplify right side
    612,635.47x = 302,569,127,894.75
  5. Step 5: Solve for x
    x = 302,569,127,894.75/612,635.47
  6. Step 6: Final answer
    x = 493,881.18

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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.