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Finding the Fourth Proportional to 346,478.40, 519,717.60 and 293,990.40

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Solution

The fourth proportional to 346,478.40, 519,717.60 and 293,990.40 is: 440,985.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,478.40 : 519,717.60 = 293,990.40 : x
  2. Step 2: Convert to fraction form
    346,478.40/519,717.60 = 293,990.40/x
  3. Step 3: Cross multiply
    346,478.40x = 519,717.60 × 293,990.40
  4. Step 4: Simplify right side
    346,478.40x = 152,791,985,111.04
  5. Step 5: Solve for x
    x = 152,791,985,111.04/346,478.40
  6. Step 6: Final answer
    x = 440,985.60

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1.5x scale

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.