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Finding the Fourth Proportional to 346,421, 478,062.42 and 187,445

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Solution

The fourth proportional to 346,421, 478,062.42 and 187,445 is: 258,674.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,421 : 478,062.42 = 187,445 : x
  2. Step 2: Convert to fraction form
    346,421/478,062.42 = 187,445/x
  3. Step 3: Cross multiply
    346,421x = 478,062.42 × 187,445
  4. Step 4: Simplify right side
    346,421x = 89,610,410,316.90
  5. Step 5: Solve for x
    x = 89,610,410,316.90/346,421
  6. Step 6: Final answer
    x = 258,674.88

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.