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Finding the Fourth Proportional to 510,053.40, 763,913.70 and 260,443.80

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Solution

The fourth proportional to 510,053.40, 763,913.70 and 260,443.80 is: 390,070.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    510,053.40 : 763,913.70 = 260,443.80 : x
  2. Step 2: Convert to fraction form
    510,053.40/763,913.70 = 260,443.80/x
  3. Step 3: Cross multiply
    510,053.40x = 763,913.70 × 260,443.80
  4. Step 4: Simplify right side
    510,053.40x = 198,956,586,900.06
  5. Step 5: Solve for x
    x = 198,956,586,900.06/510,053.40
  6. Step 6: Final answer
    x = 390,070.11

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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.